High Blood Pressure in Dogs: Symptoms and Causes
By Dr. Zubair Khalid, DVM, MS, PhD ·
High blood pressure in dogs symptoms can be easy to miss because most dogs with hypertension act normal until an organ is damaged. The most common signs owners notice are subtle: restlessness, shaking, panting, or vision changes. Because the condition is usually secondary to another disease, routine blood pressure screening is the only reliable way to catch it early.
This article is educational and is not a substitute for veterinary diagnosis or treatment.
Quick Answer
- Most dogs with high blood pressure have no obvious signs until damage occurs to the eyes, kidneys, heart, or brain.
- The most common cause in dogs is kidney disease or kidney failure, followed by hormonal conditions such as hyperadrenocorticism, diabetes mellitus, and pheochromocytoma [1].
- Shaking and panting can be signs of hypertension, but they are also common stress responses, so they must be evaluated with a blood pressure reading.
- Eye problems, including sudden blindness, are one of the most visible complications of untreated hypertension.
- A blood pressure check is quick, noninvasive, and worth requesting at every senior wellness visit.
What High Blood Pressure in Dogs Actually Means
Blood pressure is the force your dog's blood puts on the walls of the arteries. When that force stays too high, it quietly damages what veterinarians call target organs: the eyes, kidneys, heart, brain, and blood vessels.
Veterinarians divide hypertension into two types. Essential hypertension, which has no underlying cause, is common in people but extremely rare in dogs [1]. Almost every dog with high blood pressure has secondary hypertension, meaning another disease is driving the pressure up [1].
This matters for you as an owner. It means a high reading is not the whole diagnosis. It is a clue that sends your veterinarian looking for the real problem.
High Blood Pressure in Dogs Symptoms: What Owners Notice First
This is the frustrating part. Hypertension in dogs is often silent. Many dogs feel fine until a target organ is already damaged, which is why veterinarians screen for it instead of waiting for signs.
When signs do appear, they tend to be vague.
Subtle early signs
- Restlessness or pacing
- Shaking or trembling, sometimes mistaken for anxiety or pain
- Panting that seems out of proportion to activity or room temperature
- Reduced interest in walks or play
- Occasional episodes of seeming unwell that pass
Signs tied to specific organs
- Eyes: redness, dilated pupils, bleeding inside the eye, sudden blindness
- Kidneys: increased drinking and urination, which may reflect the underlying kidney disease as much as the hypertension itself
- Heart: coughing, exercise intolerance, or difficulty breathing
- Brain: disorientation, head tilt, circling, seizures, or collapse
If your dog has heart or breathing signs, see Dog Heart Disease: How to Tell If Your Dog Is in Congestive Heart Failure for a closer look at what those signs can mean.
Why shaking and panting are tricky clues
Owners often search for "high blood pressure in dogs symptoms shaking" because their dog trembles for no clear reason. Shaking and panting are real possibilities, but they are not specific. Stress, pain, nausea, and anxiety all cause the same behavior.
One thing veterinarians know for certain is that stress raises blood pressure readings. In a study of 40 healthy dogs, stress scores and Doppler blood pressure results were higher in the hospital than at home [2]. Another study found that systolic and mean blood pressure were significantly higher when the owner was absent during in-clinic measurement [3]. So a shaking, panting dog in an exam room may have a falsely high reading, and a calm dog at home may hide a real problem.
The takeaway: shaking and panting alone cannot confirm hypertension. They are reasons to check, not answers.
Can high blood pressure in dogs cause panting?
Yes, it can, but usually indirectly. Hypertension strains the heart and can lead to fluid buildup in or around the lungs, which shows up as panting or labored breathing. A case report of a dog with a large blood clot blocking the aorta described persistent tachypnea (rapid breathing) as the main reason for referral, along with cranial hypertension, heart changes, and cardiogenic pulmonary edema [4]. Panting is a sign to take seriously, but it has many causes and needs a veterinarian to sort out.
Causes and Risk Factors
Because secondary hypertension is the rule in dogs, the cause list is really a list of other diseases.
| Underlying cause | How it raises blood pressure | What owners may see |
|---|---|---|
| Kidney disease or failure | Fluid and hormone changes | Increased drinking and urination, weight loss |
| Hyperadrenocorticism (Cushing's disease) | Excess cortisol affects blood vessels | Pot belly, hair loss, panting |
| Diabetes mellitus | Metabolic and vascular effects | Increased thirst and urination, weight changes |
| Pheochromocytoma | Adrenal tumor releases pressure-raising hormones | Episodes of weakness, restlessness, collapse |
| Aortic thrombosis | Clot blocks blood flow | Sudden weakness, pain, breathing changes |
Kidney disease or failure is the single most common cause of hypertension in dogs [1]. Hyperadrenocorticism, diabetes mellitus, and pheochromocytoma are other recognized causes [1].
Age is a factor. In one study of 84 ill dogs with clinical features of hypercortisolism, the dogs with higher blood pressure readings were significantly older and smaller than the healthy control dogs [5]. That does not mean small dogs are destined for hypertension. It means older dogs, and especially older dogs with another chronic disease, deserve regular screening.
Some dogs have hypertension without an obvious cause found at first. Your veterinarian may need to run blood work, a urinalysis, and imaging to identify the driver.
How Veterinarians Diagnose It
Diagnosis starts with a number, and getting a good number takes care.
The most accurate method is direct measurement through an artery, but that is impractical in most situations [1]. The next most accurate approach is indirect measurement using a Doppler probe to assess blood flow in an artery, typically the superficial palmar arterial branch of the radial artery on the front leg, below the pressure cuff [1]. Your veterinarian may also use oscillometric equipment, which measures automatically through a cuff.
Technique matters more than owners realize. Cuff fit changes readings. A study of 62 anesthetized healthy dogs found that cuff looseness produced acceptable bias and limits of agreement, but the authors noted that cuff fit is a real source of measurement error [6]. In plain terms, a poorly fitted cuff can give a misleading result.
Environment matters too. Because stress inflates readings, some veterinarians repeat measurements at home or in a quiet room with you present [2][3]. If your dog is anxious at the clinic, ask whether a recheck in a calmer setting makes sense.
Once hypertension is confirmed, the search for a cause begins. Expect blood work, a urine test, and often imaging of the abdomen and heart. Your veterinarian will also examine the eyes carefully, because the retina is one of the first places hypertension leaves a mark.
For a deeper look at the diagnostic process, see Canine Systemic Hypertension: Diagnosis and Management.
Treatment Options
Treatment has two tracks, and both matter.
The first track is lowering the blood pressure itself. Your veterinarian will choose a medication and calculate the dose based on your dog's weight, kidney function, and other health conditions. There is no single dose that fits every dog, so never adjust or share medication on your own.
The second track is treating the underlying disease. If kidney disease is the cause, managing it may improve the pressure. If a hormonal condition such as hyperadrenocorticism or diabetes is the driver, controlling it can lower blood pressure as well [1].
Monitoring is part of treatment. Your dog will need repeat blood pressure checks, blood work to watch kidney values and electrolytes, and eye exams. The frequency depends on how high the pressure was and how well it responds. A monitoring plan tailored to your dog is described in Canine Systemic Hypertension: Diagnosis and Therapeutic Monitoring.
Diet and lifestyle changes may support treatment, especially if kidney disease is involved. Your veterinarian will tell you whether a prescription diet, sodium restriction, or weight management is appropriate for your dog.
One safety note: if your dog ever swallows a human blood pressure pill, that is an emergency. See What to Do If Your Dog Ate Your Blood Pressure Pill and call your veterinarian or a pet poison hotline right away.
Recovery, Outlook, and Long-Term Management
There is no cure for hypertension itself in most dogs. There is control, and control is meaningful.
Dogs whose pressure is brought into a safer range and whose underlying disease is managed often live comfortably for a long time. The dogs who struggle most are those whose hypertension is found only after severe organ damage, such as sudden blindness or advanced kidney failure.
Long-term management looks like this:
- Regular blood pressure checks, often at every recheck visit
- Routine blood work to monitor kidneys and electrolytes
- Eye exams, since the retina can show damage before you notice vision loss
- Consistent medication given at the same times each day
- Prompt reporting of any new coughing, breathing changes, weakness, or vision problems
Some complications are serious. Aortic thrombosis, a clot that blocks blood flow in the aorta, has been reported in a dog with severe hypertension and heart changes, and the outcome in that case was poor [4]. This is uncommon, but it shows why control matters.
If your dog has liver-related signs along with other symptoms, Liver Disease Symptoms In Dogs can help you understand what to watch for and when to call your veterinarian.
Prevention
You cannot prevent every case of hypertension, but you can catch it early.
- Ask for a blood pressure check at annual wellness visits, especially for dogs over 7 years old.
- If your dog has kidney disease, Cushing's disease, or diabetes, ask how often blood pressure should be monitored.
- Keep up with routine blood work and urine testing so underlying diseases are found sooner.
- Watch for subtle changes in vision, appetite, drinking, and energy, and mention them even if they seem minor.
- Give medications exactly as prescribed and do not skip doses.
Routine screening is the single most useful thing you can do. Hypertension in dogs is quiet, and a cuff takes only a few minutes.
Limitations and When to Contact a Veterinarian
No article can tell you whether your individual dog has high blood pressure. That requires a measurement and an examination by a veterinarian.
Call your veterinarian the same day if you notice:
- Sudden vision loss, bumping into furniture, or pupils that look different from each other
- New coughing, especially at night or after activity
- Increased drinking and urination that started recently
- Weakness, wobbliness, or a head tilt
Go to an emergency clinic now if you see:
- Collapse or fainting
- Seizures
- Difficulty breathing or blue gums
- Sudden paralysis of the back legs, which can signal a blood clot
- Bleeding inside the eye or a bulging, painful eye
For routine care, ask about a blood pressure check at your dog's next wellness visit, particularly if your dog is a senior or has a chronic condition.
Frequently Asked Questions
Can high blood pressure in dogs cause shaking?
It can, but shaking is not a reliable sign on its own. Stress, pain, and anxiety cause the same behavior, and stress itself raises blood pressure readings in the clinic. If your dog shakes often for no clear reason, a veterinary exam and a blood pressure check are the right next steps.
Can high blood pressure in dogs cause panting?
Yes, it can, usually because of strain on the heart and fluid buildup in the lungs. Panting has many causes, so it should never be blamed on hypertension without an exam. New or worsening panting deserves a prompt veterinary visit.
What eye problems does high blood pressure cause in dogs?
The retina is one of the most vulnerable targets. Hypertension can cause bleeding inside the eye, retinal detachment, and sudden blindness. Because these changes can happen quickly, any sudden vision change in an older dog should be treated as urgent.
Is high blood pressure in dogs usually caused by another disease?
Almost always. Essential hypertension is extremely rare in dogs, while secondary hypertension from another disease is common. Kidney disease or failure is the most frequent cause, with hormonal conditions such as hyperadrenocorticism, diabetes mellitus, and pheochromocytoma also responsible.
How often should my dog's blood pressure be checked?
It depends on your dog's age and health. Healthy adult dogs can be checked at annual wellness visits, and senior dogs or dogs with kidney disease, diabetes, or Cushing's disease may need checks more often. Your veterinarian will set a schedule based on your dog's specific condition.
Related Articles
- Canine Systemic Hypertension: Diagnosis and Management
- Canine Systemic Hypertension: Diagnosis and Therapeutic Monitoring
- Liver Disease Symptoms In Dogs
- Dog Heart Disease: How to Tell If Your Dog Is in Congestive Heart Failure
- What to Do If Your Dog Ate Your Blood Pressure Pill
- Symptoms Of Pancreatitis Disease In Dogs
References
- Systemic and Pulmonary Hypertension in Dogs and Cats - Circulatory System. Merck Veterinary Manual.
- Dogs evaluated in a home environment show decreased arterial blood pressure and stress levels. Journal of veterinary internal medicine, 2026.
- Influences of measurement environment and owner presence on in-clinic blood pressure in dogs. The Canadian veterinary journal = La revue veterinaire canadienne, 2026.
- Proximal aortic thrombosis in a dog. Journal of veterinary cardiology : the official journal of the European Society of Veterinary Cardiology, 2026.
- Blood Pressure and Adrenocortical Hormone Profiles in 84 Ill Dogs with Normal Post-ACTH Cortisol Concentrations. Journal of the American Animal Hospital Association, 2026.
- Blood pressure agreement between ideal and loose-fitting cuffs in anesthetized dogs. Journal of veterinary science, 2025.