# Why Is My Ferret Shaking? Causes From Play to Disease Why is my ferret shaking? Most of the time, a shaking ferret is cold, excited, just waking up, or dreaming. Shaking becomes a medical concern when it comes with weakness, drooling, wobbly back legs, or a ferret who will not eat. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - A brief shiver after a nap, during play, or in a cold room is usually normal and should stop once your ferret warms up or settles down. - Shaking with drooling, pawing at the mouth, hind leg weakness, or collapse points toward low blood sugar from an insulinoma, which needs same-day veterinary care [1][2]. - Ferrets hide illness until it is advanced, so any sudden behavior change deserves a call to your veterinarian [1]. - Never give food, sugar, or medication by mouth to a ferret who is unconscious, seizing, or unable to swallow. - Warm your ferret gently, remove the stressor, and watch for 5 to 10 minutes. If the shaking continues or worsens, call your vet. ## What Normal Shivering Looks Like in Ferrets Ferrets shiver for many of the same reasons people do. A ferret who just woke up may tremble for a minute or two while its body warms up. A ferret in a drafty room or on a cold floor may shiver until it burrows into a blanket or sleep sack. Excitement during play can also cause a quick shake or a full-body wiggle. Some ferrets shake in their sleep. Twitching paws, whiskers, and small body jerks during deep sleep are common and usually harmless. If your ferret wakes up bright, eats normally, and plays, that kind of shaking is not a worry. The pattern matters more than the shake itself. Normal shivering is brief, stops when the trigger goes away, and your ferret acts completely normal afterward. Shaking that lasts, comes back, or pairs with any change in energy, appetite, or balance is different. ## Why Is My Ferret Shaking? The Main Causes ### Cold or scared Ferrets have a thin coat and lose heat quickly. A chilly room, a bath, or a ride in a cold car can all set off shivering. Fear works the same way. Loud noises, new pets, or a stranger picking them up can make a ferret tremble and freeze. Once the ferret is warm and calm, the shaking stops. ### Low blood sugar from an insulinoma Insulinoma is one of the most common tumors in ferrets. It grows from the insulin-producing cells of the pancreas and pushes blood sugar down [2]. Shaking or tremoring is often one of the first things owners notice, along with drooling, pawing at the mouth, weakness, and dragging of the hind legs [1][2]. Some ferrets have seizures or become comatose [2]. This is the cause owners most need to know about, because it is common and it is treatable. A ferret with low blood sugar can look fine one hour and be flat the next. Severe hypoglycemia is also a serious prognostic sign. In a study of 321 client-owned ferrets, severely low blood sugar at presentation was linked to a higher risk of death within 7 days [3]. ### Heart disease Dilated cardiomyopathy is the most commonly diagnosed heart disease in ferrets, usually in those over 4 years old [4][5]. The heart walls thin out and the heart cannot pump well. Signs include lethargy, weakness, trouble breathing, and a swollen belly [5]. Shaking or trembling can show up as part of that overall weakness. Your vet may need to test for heart disease and insulinoma at the same time, because the signs overlap [5]. ### Pain or injury A ferret with a sore back, a hurt leg, or a tender belly may tremble. Pain shaking often comes with a hunched posture, reluctance to move, grinding teeth, or flinching when you touch a certain spot. A fall, a bad landing, or a fight with another pet can cause this. ### Neurologic disease Some conditions affect the nerves and muscles directly. A case report described a 7-month-old ferret with episodic hind limb weakness caused by autoimmune myasthenia gravis, a disorder where the body attacks the connection between nerves and muscles [6]. Neurologic disease from infection is also possible. Ferrets are highly susceptible to some viruses that cause severe respiratory and neurologic disease, and in one study infected ferrets developed seizures, ataxia, and hind limb weakness [7][8]. These are uncommon in pet ferrets in the United States, but they show why a vet exam matters when shaking comes with weakness or balance problems. ### Low body temperature Hypothermia is a real risk in small pets, especially after surgery, during illness, or in a cold home. A ferret that is cold, quiet, and not eating needs to be seen. Low body temperature at presentation was linked to a higher risk of death in ferrets [3]. ### Table: Cause, Clues, and Urgency | Cause | Typical clues | How urgent | |---|---|---| | Cold or scared | Shaking stops when warm or calm, ferret acts normal | Not urgent | | Insulinoma (low blood sugar) | Drooling, pawing at mouth, hind leg weakness, wobbliness, seizures | Same day, emergency if seizing or unresponsive [1][2] | | Heart disease | Lethargy, weakness, trouble breathing, swollen belly, age over 4 | Same day to urgent [4][5] | | Pain or injury | Hunched posture, flinching, won't move normally | Same day | | Neurologic disease | Balance loss, head tilt, limb weakness, abnormal gait | Urgent [6][7] | | Low body temperature | Cold to the touch, quiet, not eating | Urgent [3] | | Sleep or dreaming | Twitching while asleep, normal when awake | Not urgent | ## Red Flags That Make It an Emergency Call an emergency clinic right away if your ferret: - Collapses, cannot stand, or cannot be woken up - Has a seizure or paddles its legs - Drools heavily or paws at its mouth - Breathes hard, breathes with an open mouth, or has blue gums - Has bloody or dark, tarry droppings [1] - Vomits or has diarrhea for more than 24 hours [1] - Feels cold and will not eat - Shows sudden hind leg dragging or weakness [1] Ferrets hide illness until it is advanced, so a sick ferret can go downhill fast [1]. When in doubt, treat it as urgent. The same rule applies to shaking in other pets, and you can read more about tremors in dogs in [Why Is My Dog Shaking?](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-shaking) and [Why Is My Dog Shaking uncontrollably? 7 Causes & Emergency Red Flags](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-shaking-uncontrollably-7-causes-emergency-red-flags). ## What You Can Safely Do at Home While You Wait ### Do a 60-second check Watch your ferret from a distance first. Note whether the shaking is constant or comes in waves. Look at the legs, the mouth, and the breathing. Check if your ferret responds to its name or to a favorite treat. ### Warm your ferret gently Move your ferret to a quiet, warm room. Offer a soft blanket or sleep sack. Do not use a heating pad on high or a hot water bottle directly against the skin, because small pets burn easily. A warm room and a lap are enough. ### Offer a small amount of food only if your ferret is fully awake If your ferret is alert and swallowing normally, a small taste of its regular food or a dab of honey or corn syrup on the gums is a common first step for suspected low blood sugar. Only do this if your ferret is awake and can swallow. Never put anything in the mouth of a ferret who is seizing, limp, or unconscious, because it can choke. ### Remove the stressor Turn off loud music or television. Keep other pets and young children away. Let your ferret settle in a dim, quiet space. ### Time the episode Write down when the shaking started, how long it lasted, and what happened right before it. This information helps your vet more than almost anything else you can bring to the visit. ### Do not give medication Do not give any human or leftover pet medication. Doses for ferrets are calculated by a veterinarian based on weight and health, and some common drugs are dangerous in ferrets. ## What Your Veterinarian Will Check and Test Your vet will start with a full physical exam, including weight, hydration, heart rate and rhythm, gum color, and a neurologic check. They will ask about appetite, drooling, hind leg strength, and any episodes you have seen. Blood glucose is usually the first test when shaking is the main sign. A low reading supports insulinoma, and your vet may repeat it or pair it with an insulin level [2]. A rectal temperature and a hematocrit (a measure of red blood cells) may also be checked, since low body temperature and anemia are both linked to a higher risk of death in ferrets [3]. If heart disease is suspected, your vet may recommend chest radiographs and an echocardiogram, which is an ultrasound of the heart [4][5]. An electrocardiogram can assess the heart rhythm if an arrhythmia is heard [4]. Abdominal ultrasound can help look for pancreatic nodules, which are often small and hard to feel on exam [2]. If a neurologic problem is suspected, your vet may recommend bloodwork, imaging, and in some cases specialized testing such as electrodiagnostics, which were used to diagnose a neuromuscular disorder in one young ferret [6]. Treatment depends on the diagnosis. Heart medications are often lifelong because they manage the disease but do not reverse the changes in the heart [5]. ## Prevention and Monitoring at Home - Keep your ferret's room warm and draft-free, and always provide a sleep sack or hammock. - Feed a high-quality ferret diet and keep a written log of weight, appetite, and energy. - Weigh your ferret every 2 to 4 weeks on a small kitchen scale. Weight loss is an early clue for several diseases. - Watch for drooling, pawing at the mouth, or hind leg weakness, which are classic insulinoma signs [1][2]. - Schedule wellness exams at least once a year, and twice a year once your ferret is over 4 years old. - Ask your vet about a baseline blood glucose check at each visit. - Keep the emergency clinic number and a carrier ready to go. Older ferrets need closer watching. If you are asking why your old ferret is shaking, the answer is more likely to involve insulinoma, heart disease, or another age-related condition than simple cold. Shaking in a ferret over 4 years old should always be checked by a vet. ## Limitations and When to Contact a Veterinarian This article cannot tell you what is causing your ferret's shaking. Only a veterinarian who examines your ferret can do that. Contact an emergency clinic now if your ferret is seizing, unconscious, struggling to breathe, collapsing, or has bloody or tarry droppings [1]. Go the same day if your ferret is drooling, pawing at the mouth, dragging the hind legs, weak, or not eating [1][2]. Book a routine visit soon if the shaking is mild, comes and goes, and your ferret is otherwise normal, but do not wait more than a few days. ## Frequently Asked Questions ### Is it normal for a ferret to shake when waking up? Yes, a short shiver when a ferret wakes up is usually normal. Their body temperature drops slightly during sleep, and the muscles shiver to warm back up. If the shaking stops within a minute or two and your ferret eats and plays normally, there is nothing to worry about. ### Can low blood sugar make a ferret shake? Yes, low blood sugar from an insulinoma is one of the most common medical causes of shaking in ferrets. The tumor releases too much insulin and drives blood sugar down, which can cause tremors, drooling, weakness, and seizures. A ferret with these signs needs to be seen by a veterinarian right away. ### How can I tell if my ferret is cold or scared? A cold or frightened ferret shakes briefly and stops once it is warm or calm. A sick ferret keeps shaking, looks weak or dull, and often refuses food. If warming your ferret and giving it a quiet space does not settle the shaking within a few minutes, call your vet. ### Do older ferrets shake more often? Older ferrets do develop more health problems that can cause shaking, including insulinoma and heart disease. Heart disease is usually diagnosed in ferrets over 4 years old. Any new shaking in an older ferret deserves a veterinary exam instead of watchful waiting. ### Should I give my shaking ferret sugar at home? Only if your ferret is fully awake and able to swallow. A small dab of honey or corn syrup on the gums is a common first step for suspected low blood sugar, but it is not a treatment. Never give anything by mouth to a ferret that is seizing, limp, or unconscious, and always follow up with your veterinarian. ## Related Articles - [Ferret Adrenal Disease Signs](/knowledge/veterinary-medicine/small-mammal-care/ferret-adrenal-disease-signs) ## References 1. [Emergencies of Ferrets - All Other Pets](https://www.merckvetmanual.com/all-other-pets/ferrets/emergencies-of-ferrets). Merck Veterinary Manual. 2. [Ultrasonographic features of insulinoma in six ferrets](https://pubmed.ncbi.nlm.nih.gov/28699200/). Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, 2017. 3. [Hypothermia, anemia, hyperglycemia, and severe hypoglycemia are significant prognostic indicators of death in client-owned ferrets (Mustela putorius furo)](https://pubmed.ncbi.nlm.nih.gov/38359530/). American journal of veterinary research, 2024. 4. [Noninfectious Diseases of Ferrets - Exotic and Laboratory Animals](https://www.merckvetmanual.com/exotic-and-laboratory-animals/ferrets/noninfectious-diseases-of-ferrets). Merck Veterinary Manual. 5. [Other Noninfectious Diseases of Ferrets - All Other Pets](https://www.merckvetmanual.com/all-other-pets/ferrets/other-noninfectious-diseases-of-ferrets). Merck Veterinary Manual. 6. [Autoimmune myasthenia gravis in a ferret](https://pubmed.ncbi.nlm.nih.gov/20001782/). Journal of the American Veterinary Medical Association, 2009. 7. [Ferret Models for Henipavirus Infection](https://pubmed.ncbi.nlm.nih.gov/37610584/). Methods in molecular biology (Clifton, N.J.), 2023. 8. [Rift Valley Fever Virus Infection Causes Acute Encephalitis in the Ferret](https://pubmed.ncbi.nlm.nih.gov/33115835/). mSphere, 2020. ## Further Reading - [Merck Veterinary Manual: Ferrets](https://www.merckvetmanual.com/all-other-pets/ferrets)