Swine Feeding Equipment: Types and Maintenance

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-14

Key Takeaways

Dry feeders are the most prevalent in grow-finish operations, utilizing gravity or adjustable mechanisms to deliver feed from a hopper to a trough, with stainless steel offering superior durability (10-15 year lifespan) over galvanized or polymer options.
Wet dry feeders integrate a nipple drinker into the trough, mixing feed and water at consumption to reduce dust and potentially improve feed intake and average daily gain, though they require more frequent cleaning due to increased moisture.
Liquid feeding systems, common in large European operations, precisely deliver a mixed slurry via pipes, offering potential cost savings with byproduct utilization and improved digestibility, but necessitate significant capital investment and precise calibration.
Automatic feed delivery systems (augers, chain conveyors, flexible augers) transport feed from bins to feeders, saving labor but requiring regular inspection for wear, jamming, and proper calibration of control boxes.
Consistent feeder maintenance is critical: weekly checks for trough coverage and buildup, monthly tightening of fasteners and lubrication, and thorough washing, disinfection, and inspection between pig groups are essential for disease prevention and equipment longevity.
Feed waste, often caused by overly open flow plates or improper feeder leveling, can be mitigated by adjusting flow rates to maintain a thin, even feed layer and ensuring feeders are properly leveled and sized for the pig group.

Feeding swine is one of the most important daily tasks on any pig farm, and the equipment you choose directly affects growth rates, feed waste, and labor costs. This guide covers the main types of swine feeding equipment, how each system works, and the maintenance practices that keep feeders functioning properly. It is written for independent producers, farm managers, and employees who want to reduce feed loss, keep pigs healthy, and extend the life of their equipment.

At a Glance

Dry feeders are the most common option for grow finish operations. They allow pigs to eat on demand while keeping feed dry and protected from contamination.
Wet dry feeders mix feed and water at the point of consumption, which reduces dust and improves feed intake in many climates.
Liquid feeding systems deliver a precisely mixed ration through pipes. They are most common on large European style operations and require significant capital investment.
Automatic feed delivery systems include augers, chain conveyors, and flexible auger systems that move feed from bins to feeders. They save labor but need regular inspection.
Check feeder adjustment weekly. The most common cause of feed waste is a feeder that is set too open, allowing pigs to rake feed onto the floor.
Clean and inspect all feeders between groups. Leftover feed can harbor mold, bacteria, and pests that threaten pig health.
Keep a maintenance log. Simple records help you spot wear patterns and plan replacement parts before they fail.

Types of Swine Feeding Equipment

Choosing the right feeding equipment starts with understanding your operation size, barn type, and management style. The main categories are dry feeders, wet dry feeders, liquid feeding systems, and the delivery systems that move feed from storage to the feeder.

Dry Feeders

Dry feeders are the standard in most swine operations. They consist of a hopper that holds feed and a trough or pan where pigs eat. Feed flows from the hopper into the trough as pigs consume it. The simplest models rely on gravity, while more advanced versions have adjustable flow mechanisms.

Stainless steel feeders are the most durable option. They resist corrosion from urine, manure, and cleaning chemicals. They cost more upfront but typically last 10 to 15 years with proper care. Galvanized steel feeders are cheaper but corrode faster in humid barn conditions. Polymer and plastic feeders are lightweight and resistant to corrosion, but they can crack in extreme cold and may not hold up to aggressive chewing.

The size of the feeder matters more than most producers realize. A feeder that is too small limits access and reduces feed intake. A feeder that is too large wastes space and makes it harder for pigs to reach the feed. As a general rule, provide one feeder space for every 3 to 4 pigs in grow finish. Nursery pigs need smaller feeders with shallower troughs so they can reach the feed easily.

Adjustable flow plates are a critical feature on dry feeders. These plates control how much feed drops into the trough. When set correctly, the trough should have a thin, even layer of feed covering about half the bottom. Pigs should be able to eat without raking feed out onto the floor. Check adjustment settings weekly and adjust as pigs grow.

Wet Dry Feeders

Wet dry feeders combine feed and water in one unit. A nipple drinker is mounted inside the feeder trough, and pigs can mix dry feed with water as they eat. This system reduces feed dust, which is beneficial for pig respiratory health. It also encourages higher feed intake in hot weather because pigs consume more water at the feeder.

Research from commercial operations shows that wet dry feeders can improve average daily gain compared to conventional dry feeders in some settings. The pigs spend less time traveling between the feeder and the water source, so they eat more frequently. Feed conversion can also improve because there is less feed waste from dust and spillage.

The main downside is that wet dry feeders are more complex. They require a water line running to each unit, and the trough area gets wet and dirty more quickly. You need to clean wet dry feeders more frequently to prevent feed buildup and bacterial growth. The drinker mechanism can also clog with feed particles if not maintained.

Liquid Feeding Systems

Liquid feeding systems are the most sophisticated option. They mix dry feed with water and sometimes liquid byproducts into a slurry that is pumped through pipes to individual feeders. Each feeding station has a valve that releases a measured amount of the mixture.

These systems are common in Denmark, the Netherlands, and other European countries with large pig operations. They allow producers to use liquid byproducts from the food industry, such as whey, buttermilk, or brewery waste, which can reduce feed costs. The slurry also improves digestibility for some ingredients.

Liquid feeding requires a significant capital investment. You need mixing tanks, pumps, pipes, valves, and a control system. The control system is essential because it calculates the amount of feed each pen receives based on pig weight, growth stage, and feed curve. This precision can improve feed conversion, but the system is only as good as the calibration and maintenance behind it.

For most small and mid sized operations in the United States, liquid feeding is not cost effective. The exception is operations that have access to cheap liquid byproducts and the management skill to run the system properly.

Automatic Feed Delivery Systems

Regardless of feeder type, you need a way to get feed from the storage bin to the feeder. The three main options are auger systems, chain conveyors, and flexible augers.

Auger systems use a spiral blade inside a tube to push feed horizontally or at a slight angle. They are simple, reliable, and common in grow finish barns. The auger runs from the bin to a drop tube above each feeder. When the feeder calls for feed, a sensor opens a slide and the auger delivers feed until the feeder is full. Augers can handle most feed types, including pelleted and meal feed, but they can grind feed if the auger runs when the tube is empty.

Chain conveyors use a continuous chain with paddles that pull feed through a tube. They can move feed both horizontally and vertically, making them useful in barns with complex layouts. Chain conveyors are quieter than augers and cause less feed degradation. However, they have more moving parts and require more maintenance.

Flexible augers are a newer option that uses a spring steel auger inside a flexible plastic tube. They can navigate corners and bends, which makes installation easier in existing barns. Flexible augers are best suited to shorter distances and smaller operations.

Every delivery system needs a control box that runs the motor and monitors the system. Most modern systems use a timer or a sensor that detects when the feeder is full. The control box should have an alarm that sounds if the system jams or the motor overheats.

Choosing the Right Feeder for Your Operation

The best feeder for your farm depends on several factors. Consider your barn type, pig size, feed form, and labor availability before making a purchase.

Barn type matters. Fully slatted floors allow spilled feed to fall through, so a slightly more open feeder setting is less costly. Solid floors require a tighter feeder adjustment because spilled feed builds up on the floor and attracts pests. In a naturally ventilated barn, feeders should be positioned to avoid drafts that blow feed dust around.

Pig size determines feeder dimensions. Nursery pigs need a trough depth of about 3 to 4 inches and a feeder space width of about 6 inches. Grow finish pigs need a trough depth of 5 to 6 inches and a feeder space width of 10 to 12 inches. Sows in gestation use individual stalls or electronic sow feeders, which are a separate category. Electronic sow feeders identify each sow by an ear tag and deliver a measured ration. These systems require careful training and monitoring.

Feed form affects feeder choice. Pelleted feed flows more easily through feeders and is less likely to bridge or clog. Meal feed can pack in the hopper, especially in humid conditions. If you feed meal, choose a feeder with a steep hopper angle and an agitator that breaks up bridging.

Labor availability is a real constraint. A feeder that requires daily adjustment or frequent cleaning will only work if you have the staff to maintain it. Many producers choose simpler feeders because they do not have enough labor to manage complex systems properly.

Installation and Setup

Proper installation prevents many common feeder problems. Start by positioning feeders on a level surface. An uneven feeder causes feed to pool on one side and restricts access on the other. In most barns, you can adjust leg height or use shims to level the feeder.

Connect water lines correctly. For wet dry feeders, the water line should have a shutoff valve and a pressure regulator. Water pressure should be set according to the manufacturer recommendation, typically 20 to 40 psi for nipple drinkers. Too much pressure causes water to splash and waste. Too little pressure reduces water intake and limits feed consumption.

Set the feeder height for the pig size. The trough lip should be at shoulder height for the smallest pig in the pen. If the feeder is too high, small pigs struggle to reach the feed. If it is too low, pigs step into the trough and contaminate the feed. Many feeders have adjustable legs or mounting brackets. Check the height at each group change and adjust as needed.

Calibrate the feed delivery system. When you install a new auger or chain system, verify that the amount of feed delivered matches the setting on the control box. Run the system for a set time and weigh the feed that comes out. Adjust the timer or sensor until the delivery rate is accurate. Recheck calibration every few months because wear changes the system performance.

Feeding Management Practices

Equipment is only one part of the feeding system. How you manage feeding affects pig performance and feed waste just as much as the equipment itself.

Fill feeders to the correct level. Most dry feeders work best when the hopper is kept between one third and two thirds full. A completely full hopper puts pressure on the feed column and can cause feed to flow too fast, leading to waste. A nearly empty hopper means feed has been sitting in the hopper for a long time, which can reduce palatability. Refill feeders on a schedule that matches consumption.

Adjust the flow rate for each group. Young pigs need a smaller opening than finishing pigs. Check the trough coverage daily for the first few days after a new group is placed. If feed is building up in the trough, close the adjustment. If the trough is empty for long periods, open it slightly. The goal is a thin layer of feed covering about half the trough bottom.

Watch for feed bridging. Meal feed and feeds with added fat can bridge in the hopper, creating a void that stops feed flow. Pigs will root and bang the feeder when this happens. If you see pigs working hard to get feed but the trough is empty, check the hopper for bridging. Many feeders have a rod or agitator that you can pull to break up the bridge.

Feed according to a schedule. Pigs perform best when they have consistent access to feed. In most grow finish systems, pigs should have feed available at all times. Limit feeding is only appropriate in specific situations, such as gestation or when managing feed intake for carcass quality. If you use a restricted feeding program, deliver feed at the same times each day to reduce stress.

Monitor feed intake by pen. Track how much feed each pen consumes each week. A sudden drop in intake can signal disease, feeder malfunction, or a problem with the feed itself. A sudden increase may indicate feed waste from a feeder that is set too open. Compare intake across pens to spot problems early.

Maintenance of Pig Feeders

Regular maintenance is the difference between feeders that last a decade and feeders that fail in two years. Establish a weekly, monthly, and between group maintenance schedule.

Weekly Maintenance Tasks

Walk through the barn and inspect every feeder at least once per week. Look for the following:

Check trough coverage. Look at the feed level in each trough. Adjust the flow plate if feed is building up or if the trough is empty for extended periods.

Check for feed buildup. Wet feed can accumulate in corners of the trough, especially in wet dry feeders. This caked feed reduces trough capacity and can grow mold. Scrape out any buildup you find.

Check water flow. For wet dry feeders and any feeder with an integrated drinker, verify that water flows properly. A slow drinker reduces feed intake. A fast drinker wastes water and increases pit volume.

Check for damage. Look for bent trough edges, cracked plastic, or rusted metal. Small problems become large ones if left unaddressed.

Check the area around the feeder. Look for spilled feed on the floor. A small amount is normal, but large piles indicate a feeder adjustment problem. Sweep up spills and adjust the feeder.

Monthly Maintenance Tasks

Once per month, do a more thorough inspection and service.

Tighten bolts and fasteners. Feeders vibrate during use, and bolts work loose over time. Check all fasteners and tighten as needed. Pay special attention to the legs and the adjustment mechanism.

Lubricate moving parts. The adjustment rods, agitators, and any hinges should move freely. Apply a food grade lubricant to prevent rust and sticking.

Inspect the feed delivery system. Check the auger or chain for wear. Look for worn flighting, loose connections, and unusual noise. Check the drop tubes for buildup and blockages.

Clean the control box. Dust and feed particles can accumulate in the control box and cause sensor failures. Blow out the box with compressed air and check the wiring for damage.

Check the bin and delivery system. Look for condensation inside the bin, which can cause feed to cake and bridge. Check the bin vent and the boot where the auger connects to the bin.

Between Group Maintenance

When a group of pigs leaves a pen, do a complete feeder cleaning and inspection before the next group arrives.

Empty the feeder completely. Remove all remaining feed from the hopper and trough. This feed may be contaminated with saliva, dust, or feces and should not be fed to the next group.

Wash the feeder thoroughly. Use a pressure washer with hot water and a swine safe detergent. Pay special attention to the trough, the inside of the hopper, and any crevices where feed can hide. Rinse thoroughly to remove all soap residue.

Disinfect the feeder. After washing, apply a disinfectant approved for livestock equipment. Allow the disinfectant to sit for the recommended contact time, then rinse again. This step is critical for breaking disease cycles.

Inspect for wear and damage. With the feeder clean, you can see cracks, rust, and worn parts more easily. Replace any damaged components before the next group arrives.

Check the adjustment mechanism. Clean and lubricate the flow plate and adjustment rod. Verify that the feeder can be set to the correct opening for the incoming pig size.

Verify water system function. For wet dry feeders, check the drinker, the water line, and the connections. Replace any worn washers or nipples.

Common Feeder Problems and Solutions

Even with good maintenance, feeders develop problems. Here are the most common issues and how to fix them.

Feed Waste

Feed waste is the most expensive feeder problem. It is often invisible because pigs eat the spilled feed off the floor, but you pay for every pound that goes through the feeder. Signs of waste include feed dust in the pit, pigs spending time rooting on the floor, and higher than expected feed conversion.

The most common cause is a flow plate that is set too open. Pigs dig through the feed to find the freshest pellets and push feed out of the trough. Adjust the flow plate so that feed only covers the bottom of the trough. If waste continues, check the trough depth. A shallow trough allows pigs to flip feed out more easily.

Another cause is feeder design. Some feeders have troughs that are too shallow or edges that are too low. If you have persistent waste with a particular feeder model, consider replacing it with a design that has deeper troughs and higher edges.

Feed Bridging

Bridging occurs when feed forms an arch in the hopper and stops flowing. It is more common with meal feed, high fat feed, and feed that has absorbed moisture. Pigs will root at the feeder and may damage the equipment trying to reach feed.

To fix a bridge, use a paddle or rod to break up the feed arch. Many feeders have a built in agitator for this purpose. To prevent bridging, keep the hopper between one third and two thirds full, and avoid storing feed for long periods in humid conditions. Some producers add a small amount of oil or molasses to the feed to improve flow, but this changes the ration and should be discussed with a nutritionist.

Feeder Clogging

Clogging is the opposite of bridging. Feed packs into the bottom of the hopper and blocks the opening. This is more common with pelleted feed that breaks down into fines. The fines mix with moisture and form a hard plug.

To fix a clog, empty the hopper and scrape out the packed feed. Check the flow plate and opening for obstructions. To prevent clogs, keep the feeder clean and adjust the flow rate so that feed does not sit in the trough for long periods.

Uneven Feed Distribution

Some feeders deliver more feed to one side of the trough than the other. This happens when the feeder is not level or when the flow plate is worn on one side. Pigs will crowd around the side with more feed, causing stress and reducing intake for timid pigs.

Level the feeder and check the flow plate for wear. Replace the plate if it is worn unevenly. If the problem persists, the feeder may have a manufacturing defect and should be replaced.

Drinker Problems in Wet Dry Feeders

Wet dry feeders have drinkers that can clog with feed particles. A clogged drinker reduces water flow and limits feed intake. Clean the drinker weekly and check the water pressure. If drinkers clog frequently, consider installing a filter on the water line.

Auger and Delivery System Problems

The most common delivery system problem is a jammed auger. This happens when feed bridges in the drop tube or when foreign objects enter the system. The control box alarm should sound when the auger stalls. Clear the jam and inspect the system for damage before restarting.

Another common problem is auger wear. The flighting on the auger wears down over time, reducing the delivery rate. Inspect the auger monthly and replace it when the flighting shows significant wear.

Monitoring and Recordkeeping

Good recordkeeping helps you identify problems before they become costly. Track the following for each group of pigs:

Feed delivery records. Record the amount of feed delivered to each pen each week. Compare this to the expected intake based on pig weight and growth stage. Large deviations indicate a problem.

Feeder adjustment settings. Record the flow plate setting for each feeder at each group change. This helps you set feeders correctly when a new group arrives.

Maintenance log. Record all maintenance tasks, repairs, and parts replacements. This log helps you predict when parts will need replacement and identify feeders that have chronic problems.

Feed conversion. Calculate feed conversion for each pen at the end of the group. Compare pens to identify feeders that are performing poorly. A pen with poor feed conversion may have a feeder that is wasting feed.

Repair costs. Track the cost of parts and labor for each feeder. If a feeder requires constant repair, it may be more cost effective to replace it.

Use a simple spreadsheet or a notebook for these records. The goal is not to create paperwork but to give you the information you need to make good decisions.

When to Call a Veterinarian or Extension Agent

Most feeder problems are mechanical and can be solved by the producer. However, some situations require professional help.

Call a veterinarian if you see signs of disease related to feeding equipment. If pigs are refusing feed, losing weight, or showing signs of illness, the feeder may be spreading disease. This is especially important if you see mold in the feeder or if feed has been contaminated with feces. A veterinarian can help diagnose the problem and recommend treatment.

Call a veterinarian if pigs are not consuming enough feed. If you have checked the feeder and water system and pigs are still not eating, there may be a health problem. Reduced feed intake is one of the first signs of many swine diseases.

Call an extension agent if you are designing a new feeding system. Extension agents can provide information on feeder selection, barn layout, and system design. They can also help you evaluate new technology and connect you with other producers who have experience with different systems.

Call an extension agent if you have questions about feed formulation. The feeder is only part of the system. If you are considering a new feed type or changing your ration, an extension agent or nutritionist can help you make the change correctly.

Call a veterinarian or extension agent if you are seeing unexpected feed conversion numbers. Poor feed conversion can indicate a feeder problem, a feed quality problem, or a health problem. A professional can help you determine the cause and develop a plan to correct it.

Frequently Asked Questions

How often should I clean pig feeders?

Clean feeders between every group of pigs. This means a complete empty, wash, disinfect, and rinse process. During a group, spot clean any caked feed from the trough weekly. Wet dry feeders need more frequent attention because the wet feed builds up faster.

What is the ideal feeder space per pig?

For grow finish pigs, provide one feeder space for every 3 to 4 pigs. A feeder space is typically 10 to 12 inches wide. Nursery pigs need more space relative to their size, about 6 inches per pig. If pigs are fighting at the feeder or if timid pigs are not getting enough to eat, add more feeder space.

Why is my feeder wasting so much feed?

The most common cause is a flow plate that is set too open. Pigs dig through the feed and push it out of the trough. Adjust the flow plate so that feed only covers the bottom of the trough. Also check that the feeder is level and that the trough is not damaged. If the problem continues, the feeder design may not be suited to your feed type.

Should I use a wet dry feeder or a conventional dry feeder?

Both systems can work well. Wet dry feeders reduce dust and can improve intake in hot weather, but they require more cleaning and maintenance. Conventional dry feeders are simpler and cheaper to maintain. Consider your climate, labor availability, and barn layout when choosing.

How do I stop feed from bridging in the hopper?

Keep the hopper between one third and two thirds full. Do not let feed sit in the hopper for more than a few days, especially in humid conditions. Use a feeder with a steep hopper angle and an agitator. If bridging is a chronic problem, talk to your feed supplier about flow agents that can be added to the feed.

How long should a pig feeder last?

With proper maintenance, a stainless steel feeder can last 10 to 15 years. Galvanized feeders last 5 to 10 years, and plastic feeders last 3 to 7 years depending on the quality of the plastic and the conditions in the barn. Regular cleaning and prompt repair of damage extend the life of any feeder.

Do I need an automatic feed delivery system?

Automatic delivery systems save labor and are almost essential for operations with more than a few hundred pigs. For small operations, hand filling feeders may be more cost effective. Consider the value of your labor and the size of your operation when making this decision.

What should I do if my pigs are not eating?

First check the feeder. Is feed flowing properly? Is the trough empty or full? Check the water system. Pigs will not eat if they cannot drink. Check the temperature in the barn. Pigs reduce intake in extreme heat. If all of these are normal, call a veterinarian to check for health problems.

Related Farming Guides

This section will be populated with links to other farming guides on this site. Check back for related content on swine nutrition, barn management, pig health, and other topics relevant to your operation.

Related Clinical & Scientific Guides

References

National Pork Board: https://www.pork.org/
USDA APHIS Swine Health: https://www.aphis.usda.gov/livestock-poultry-disease/swine
FAO Pig Production: https://www.fao.org/pig-production-and-products/en/
FAO Animal Production and Health: https://www.fao.org/animal-production/en/
WOAH (World Organisation for Animal Health): https://www.woah.org/en/home/

This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.