Neurological Emergencies in Pets: Recognizing the Signs That Can't Wait

Neurological emergencies can appear suddenly and progress rapidly. Knowing what to look for, and when to act, can make a critical difference in your pet’s outcome. If your dog or cat is experiencing any of the following, please contact us immediately at (423) 581-9492.

Seizures and Status Epilepticus

A seizure occurs when abnormal electrical activity in the brain causes involuntary movements or behaviors. While a single, brief seizure may not always be immediately life-threatening, seizures lasting more than 5 minutes or multiple seizures occurring in a 24-hour period constitute a medical emergency called status epilepticus, and require immediate intervention.

Signs to watch for:

• Sudden loss of consciousness or muscle control
• Paddling legs, jaw chomping, or full-body convulsions
• Loss of bladder or bowel control during the episode
• Prolonged confusion, blindness, or extreme disorientation after the seizure (post-ictal phase)

When it’s an emergency:

• A seizure lasting longer than 5 minutes
• Two or more seizures within 24 hours
• Your pet does not recover to normal behavior within 30 minutes of a seizure

The Risk: Prolonged seizures cause brain damage, dangerous overheating, and can be fatal. Do not wait to see if a second seizure occurs.

Sudden Loss of Balance or Coordination (Ataxia)

Ataxia (the sudden inability to walk normally, maintain balance, or coordinate movements) can be caused by conditions ranging from inner ear dysfunction to spinal cord injury or a vascular event (sometimes called a “stroke” in pets). Sudden-onset ataxia always warrants emergency evaluation.

Signs to watch for:

• Falling, stumbling, or listing to one side
• Head tilt with rapid, involuntary eye movement (nystagmus)
• Inability to stand or walk
• Running into objects or seeming confused about surroundings

Fainting Aortic Thromboembolism (FATE/Saddle Thrombus) in Cats

FATE is a devastating emergency specific to cats, most often occurring in those with underlying heart disease. A blood clot lodges at the base of the aorta (the “saddle”), blocking blood flow to the hind legs. Affected cats experience sudden, severe paralysis of the hind limbs and intense pain.

Signs to watch for immediately:

• Sudden inability to use the back legs. Legs are cold, limp, or dragging
• Crying or vocalizing intensely due to pain
• Labored breathing, pale or bluish gum color

The Risk: This condition requires immediate emergency pain management and intensive care. Time to treatment is critical for outcomes.

Vestibular Disease (“Old Dog Syndrome”)

Sudden vestibular syndrome in dogs, particularly in senior dogs, can closely mimic a stroke. It affects the vestibular system that controls balance, causing dramatic but often treatable symptoms. While the condition itself is usually not life-threatening, it must be distinguished from truly severe neurological emergencies through prompt evaluation.

Symptoms:

• Sudden, severe head tilt
• Rapid eye movement from side to side (nystagmus)
• Falling, rolling, or being unable to stand
• Nausea and vomiting from disorientation

Traumatic Brain Injury (TBI)

Any significant blow to the head, from a vehicle strike, a fall, a kick, or a blunt force encounter, can cause a traumatic brain injury. TBI can initially appear mild but deteriorate rapidly as swelling or bleeding inside the skull increases. Pets who have experienced significant head trauma should always be evaluated immediately, even if they seem alert.

Signs to watch for:

• Different-sized pupils (one large, one small)
• Loss of consciousness, even briefly
• Seizures following head trauma
• Progressive lethargy, confusion, or disorientation

Neurotoxicity / Toxin Exposure

Many common household and outdoor toxins, including certain mushrooms, blue-green algae, xylitol (in sugar-free products), certain medications, and others, can cause serious neurological symptoms. If you suspect your pet has been exposed to a toxin, time is critical.

Common signs:

• Muscle tremors or twitching
• Extreme agitation or vocalization
• Paralysis or sudden inability to move
• Dilated pupils, drooling, and extreme salivation

Common Culprits: Metaldehyde (slug/snail bait), permethrin (in dog flea products applied to cats), xylitol, blue-green algae, and certain wild mushrooms.