Dog Green Eye Discharge and Shaking
Green eye discharge combined with shaking or tremors in a dog is a combination that can suggest infection, pain, fever, or in some cases neurological involvement. Shaking in dogs can take several forms, from generalized trembling to localized muscle fasciculations, and identifying the type and context of the shaking can help narrow down the possible causes. This article covers what these signs may represent, what to observe, and when veterinary evaluation is recommended.
Quick Answer
Green eye discharge in dogs typically indicates a bacterial infection, while shaking or trembling may accompany fever, pain, nausea, anxiety, or neurological conditions. When these two signs occur together, possible causes range from a localised eye infection causing fever and chills to more serious systemic illnesses such as canine distemper, leptospirosis, tick-borne diseases, or conditions affecting the nervous system. A dog that is shaking and has green eye discharge should be evaluated by a veterinarian, especially if the shaking is persistent, severe, or accompanied by additional signs such as lethargy, vomiting, or loss of coordination.
SYMPTOM TRIAGE
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What Can This Symptom Look Like?
The combination of green eye discharge and shaking may present in several different ways depending on the underlying cause:
- Thick, purulent green discharge from one or both eyes, sometimes crusting around the eyelids.
- Generalized body trembling or shaking, which may be continuous or intermittent, and may worsen when the dog is at rest.
- Localized twitching or fasciculations in specific muscle groups, such as the facial muscles, hind legs, or back.
- Shaking that resembles chills, where the dog appears to be cold despite normal room temperature, which can accompany fever.
- Head shaking, which may indicate ear discomfort or pain extending from the eye area.
- Reddened, swollen, or puffy eyelids and inflamed conjunctival tissue.
- Squinting or light sensitivity, suggesting ocular pain or inflammation.
- Pawing at the eyes or face, indicating discomfort.
- Hiding, clinginess, or anxiety, which can occur when a dog is in pain or feeling unwell.
- Accompanying signs such as vomiting, diarrhoea, lethargy, loss of appetite, or nasal discharge.
Shaking in dogs is a non-specific sign, meaning it can arise from many different causes. The context in which the shaking occurs, along with other symptoms present, helps determine whether the cause is likely to be fever, pain, nausea, stress, or a neurological condition.
What May Be Associated With This Symptom?
Bacterial Eye Infection with Fever
A bacterial eye infection such as conjunctivitis can produce green discharge and, if the infection is moderate or severe, an associated fever. When a dog has a fever, it may shake or tremble much like a human with a fever experiences chills. The body's thermoregulatory response to an elevated temperature can cause visible shivering even in a warm environment. Dogs with this combination may also show lethargy, reduced appetite, warm ears and paws, and reluctance to move.
Canine Distemper
Canine distemper is a viral disease that affects multiple body systems, including the respiratory, gastrointestinal, and nervous systems. It commonly produces thick green or yellowish eye and nasal discharge in its early stages. As the disease progresses, it can cause neurological signs including muscle tremors, twitching, seizures, and loss of coordination. Shaking in a dog with green eye discharge, particularly a puppy or unvaccinated dog, raises concern for distemper and warrants immediate veterinary assessment. Vaccination is the most effective preventive measure.
Leptospirosis
Leptospirosis is a bacterial disease that can cause liver and kidney damage. Systemic illness from leptospirosis can produce fever, shaking, eye discharge, vomiting, diarrhoea, muscle pain, and jaundice. Dogs may appear stiff or reluctant to move due to muscle inflammation. Leptospirosis is zoonotic and can be transmitted to humans. Dogs with access to standing water, rural environments, or wildlife habitats may be at higher risk.
Tick-Borne Diseases
Tick-transmitted illnesses such as ehrlichiosis, anaplasmosis, Lyme disease, and Rocky Mountain spotted fever can cause fever, joint pain, muscle trembling, eye discharge, and lethargy. The systemic inflammatory response generated by these infections can produce shaking that resembles chills or generalized weakness. In some cases, joint inflammation and pain may cause the dog to shake or shift weight repeatedly, especially when attempting to stand or walk.
Pain or Discomfort
Eye pain from infection, corneal ulceration, glaucoma, or foreign body irritation can be severe enough to cause shaking. Dogs experiencing significant ocular pain may tremble, whine, paw at the affected eye, and become withdrawn. Shaking driven by pain may be more pronounced when the dog is touched near the head or when light is bright. Pain-related shaking is often accompanied by other behavioural changes such as restlessness, panting, or hiding.
Nausea or Gastrointestinal Distress
Nausea can cause dogs to shake or tremble, sometimes accompanied by lip smacking, excessive drooling, or repeated swallowing. If the dog has both an eye infection and a gastrointestinal condition (or a systemic disease affecting both systems), green eye discharge and shaking may occur together. Gastroenteritis, dietary indiscretion, pancreatitis, or systemic infections that cause nausea may all produce this combination of signs.
Toxicity or Poisoning
Exposure to certain toxins, including some plants, chemicals, medications, or contaminated substances, can cause neurological signs such as shaking, tremors, or seizures, alongside other symptoms that may include eye discharge if the exposure also causes systemic inflammation or direct irritation. Known or suspected toxin exposure requires immediate emergency veterinary care.
Hypoglycaemia
Low blood sugar (hypoglycaemia) can cause shaking, trembling, weakness, disorientation, and in severe cases seizures. This is most common in puppies, toy breeds, diabetic dogs receiving too much insulin, or dogs with underlying metabolic conditions. If hypoglycaemia occurs alongside an unrelated eye infection producing green discharge, both signs may be present simultaneously. Hypoglycaemia is a medical emergency that requires immediate treatment.
Neurological Conditions
Conditions that affect the brain or nervous system, such as encephalitis (inflammation of the brain), meningitis, or certain tumours, can cause tremors, shaking, and eye changes including discharge if the condition also triggers secondary infection or inflammation. Canine distemper is one of the more common infectious causes of neurological signs with concurrent eye discharge, but other conditions such as granulomatous meningoencephalitis (GME) or protozoal infections can also produce similar presentations.
What Should the Pet Owner Monitor?
Observing and documenting the details of both the eye discharge and the shaking can provide valuable information for a veterinarian. Owners should note:
- Type of shaking: Is the shaking generalized (affecting the whole body), localized to one area (such as the head or a single leg), or intermittent? Does it resemble chills, weakness tremors, or seizure activity?
- Timing and triggers: When does the shaking occur? Does it worsen at rest, during movement, or in response to specific triggers such as light, noise, or touch?
- Duration and frequency: Is the shaking continuous or episodic? How long do episodes last?
- Eye discharge characteristics: Colour, consistency, one or both eyes, and whether it has changed over time.
- Additional signs: Vomiting, diarrhoea, nasal discharge, coughing, limping, loss of appetite, or changes in behaviour.
- Temperature and environment: Is the dog in a cold environment, or does the shaking occur despite normal room temperature?
- Gum colour: Pink gums are normal. Yellow, pale, white, or blue-tinged gums suggest systemic illness.
- Vaccination and preventive care status: Whether the dog is current on vaccines and parasite prevention.
- Exposure history: Contact with ticks, standing water, wildlife, unfamiliar animals, or potential toxins.
What Can the Owner Safely Do Next?
While arranging veterinary evaluation, the following measures may help keep the dog safe and comfortable:
- Keep the dog warm and comfortable if the shaking resembles chills, using a light blanket. Avoid overheating, as fever may also be present.
- Gently clean the eyes with a sterile saline-moistened cotton ball, wiping from the inner corner outward. Use a separate pad for each eye.
- Prevent self-injury with an Elizabethan collar if the dog is pawing at its eyes or face.
- Offer water in small amounts to maintain hydration, but do not force the dog to drink.
- Offer bland food in small portions, such as plain boiled chicken with white rice, if the dog is willing to eat.
- Limit physical activity and keep the dog in a quiet, safe space where it cannot injure itself if shaking becomes severe.
- Record a video of the shaking if possible, as this can be very helpful for the veterinarian in assessing the type and severity of the tremors.
- Do not administer human medications, including eye drops, pain relievers, or anti-seizure drugs, unless directed by a veterinarian. Many human drugs are toxic or inappropriate for dogs.
When to Contact a Veterinarian
Seek Emergency Care Immediately If:
- The shaking is severe, continuous, or resembles a seizure (loss of consciousness, paddling legs, uncontrolled movements).
- The dog is unable to stand, walk, or hold its head steady.
- The gums are pale, yellow, white, or blue-tinged.
- The eye is bleeding, severely swollen, protruding, or appears to be ruptured.
- The dog is extremely lethargic, unresponsive, or has collapsed.
- Known or suspected toxin exposure has occurred.
- The dog is a diabetic on insulin and shaking may indicate hypoglycaemia.
- The dog is a puppy or toy breed and shaking may indicate low blood sugar.
Schedule a Veterinary Visit Promptly If:
- Shaking persists for more than a few hours without an obvious cause such as cold exposure or excitement.
- Green eye discharge is present alongside the shaking.
- Additional signs develop, including fever, vomiting, diarrhoea, loss of appetite, nasal discharge, or joint pain.
- The dog's overall behaviour has changed, including increased hiding, anxiety, or clinginess.
Shaking is a sign that should always be taken seriously, particularly when it appears alongside green eye discharge. The combination may indicate an infection that is producing a systemic inflammatory response, a disease affecting the nervous system, or a painful condition that requires treatment. Prompt veterinary evaluation helps identify the cause and ensures appropriate care is started as early as possible.
FAQ
Can an eye infection cause a dog to shake?
Yes. A bacterial eye infection can produce fever and systemic inflammation that may cause shaking or trembling similar to chills in humans. Pain from a severe eye infection can also cause shaking. However, shaking that occurs alongside eye discharge may also indicate a broader systemic condition rather than just a localised eye problem, which is why veterinary evaluation is recommended.
Why is my dog shaking but not cold?
Shaking in a dog that is not cold can be caused by fever, pain, nausea, anxiety, low blood sugar, neurological conditions, or the side effects of certain medications or toxins. When shaking occurs alongside another symptom such as green eye discharge, it is more likely to be related to infection, inflammation, or a systemic disease process rather than a benign cause.
Should I be worried if my puppy has green eye discharge and is shaking?
Yes. Puppies are particularly vulnerable to serious infections such as canine distemper, which can produce green eye discharge and neurological signs including tremors and shaking. Puppies are also more susceptible to hypoglycaemia (low blood sugar), which can cause shaking and requires emergency treatment. Any puppy showing both green eye discharge and shaking should be evaluated by a veterinarian as soon as possible.
What veterinary tests might be needed for a dog with green eye discharge and shaking?
A veterinarian may perform a comprehensive eye examination and a full physical and neurological assessment. Blood work including a complete blood count and biochemistry panel can evaluate for infection, inflammation, organ disease, and blood glucose levels. Depending on the suspected cause, additional tests may include tick-borne disease panels, leptospirosis testing, distemper titres, thyroid function tests, neurological imaging (MRI or CT), or cerebrospinal fluid analysis if neurological disease is suspected.
SYMPTOM TRIAGE
Green eye discharge with shaking can be associated with conditions ranging from infection and fever to neurological disease. Use our Symptom Triage tool to assess your dog's specific signs and understand how promptly veterinary care may be needed.
This tool does not diagnose conditions or replace a veterinarian.
Sources: American Veterinary Medical Association (AVMA), Cornell University College of Veterinary Medicine, Merck Veterinary Manual, Royal College of Veterinary Surgeons (RCVS).
Disclaimer: This article and the PawAI Symptom Triage tool provide general educational information only. They cannot examine your pet, make a diagnosis, or replace advice from a licensed veterinarian. Contact a veterinarian promptly if symptoms are severe, worsening, persistent, or accompanied by emergency warning signs.