If your dog is shaking and seems unusually weak, it’s often a sign that something is seriously wrong. Whether the cause is internal illness, neurological problems, or external stressors, these symptoms should never be dismissed—especially if they come on suddenly.
We outline the common causes of dog shaking and weakness, what you can do at home, and when to seek veterinary help.
Why Is My Dog Shaking and Weak — Why It Happens
Dogs shake and become weak due to illness, pain, metabolic disturbances, or neurological conditions. These symptoms may occur suddenly or develop over time, and they often reflect a deeper issue affecting your dog’s stability, strength, or nervous system.
Common Causes of Dog Shaking and Weakness
Pain or Discomfort
Dogs in pain—whether due to injury, dental disease, arthritis, or internal illness—often shake and act lethargic.
Shaking is the body’s stress response, while weakness may result from the dog’s reluctance to move due to discomfort.
They might avoid stairs, lie down frequently, or whine when touched.
Pain relief and identifying the underlying cause is essential to restore comfort and mobility.
Neurological Disorders
Diseases affecting the brain or spinal cord—like intervertebral disc disease (IVDD), stroke, encephalitis, or tumors—can cause shaking, weakness, or partial paralysis.
These dogs may drag their limbs, collapse, or struggle to stay upright.
Seizure disorders can also leave dogs shaky and disoriented in the post-ictal phase.
Neurological evaluations and imaging are critical to determine the cause and prognosis.
Hypoglycemia (Low Blood Sugar)
A sudden drop in blood sugar can lead to tremors, lethargy, unsteadiness, and even collapse.
This is especially common in puppies, toy breeds, or diabetic dogs with insulin imbalances.
Affected dogs may seem dazed, cold to the touch, or unable to stand.
Immediate treatment with a glucose source followed by vet care is necessary to stabilize them.
Read more: Dog Shaking and Wobbling (When balance loss becomes dangerous)
Infections or Fever
Systemic infections—such as parvovirus, leptospirosis, or tick-borne diseases—can cause weakness and shivering.
The body shakes due to fever, chills, or inflammation, and weakness stems from energy depletion.
Additional signs may include vomiting, diarrhea, nasal discharge, or coughing.
Blood tests and early treatment can improve outcomes dramatically.
Heart or Respiratory Conditions
Heart disease, congestive heart failure, or severe lung problems can cause low oxygen levels, fatigue, and trembling.
Dogs may cough, breathe heavily, or seem exhausted after minimal exertion.
They may also collapse during episodes of weakness or stress.
These cases require urgent diagnostics like X-rays, ECGs, and oxygen therapy.
What to Do If Your Dog Is Shaking and Weak
Immediately limit your dog’s movement and provide a calm, quiet space for them to rest.
Offer small amounts of water—but avoid food until your vet approves.
Keep them warm and observe their breathing, responsiveness, and ability to stand or walk.
Take note of any additional symptoms like vomiting, diarrhea, confusion, or limping.
Record the onset and duration of symptoms and contact your vet promptly.
When to Call or Visit Your Vet
Seek veterinary help right away if your dog:
Cannot stand or walk
Collapses or shows signs of disorientation
Has pale gums or rapid breathing
Is shaking continuously or appears to be in pain
Shows additional signs like vomiting, diarrhea, or seizures
These symptoms often reflect a medical emergency and should not be managed at home without professional advice.
Read more: Dog Shaking and Can’t Walk (How to respond)
Key Takeaway
Shaking and weakness in dogs is a red flag for serious health issues—from pain and infection to neurological disease or metabolic crisis.
Act quickly to protect your dog’s safety and get them the medical care they need.
With early treatment, many causes can be managed or resolved to give your dog relief and recovery.