Pet symptom guide

Vomiting is the body's way of expelling something it can't handle. One-off vomiting after a known food trigger is usually fine; repeated vomiting needs vet attention.

Diarrhea has many food-related causes — dietary indiscretion, food allergies, lactose intolerance, or true toxicity. Severity ranges from a one-day loose stool to a vet emergency.

Sudden lethargy after a meal — when a pet is unusually tired, weak, or unresponsive — is a red flag for toxicity, low blood sugar, or organ stress.

Muscle tremors, twitching, or seizures after eating are emergencies. Common causes include xylitol, chocolate (theobromine), caffeine, and certain nuts.

Sudden refusal to eat is a non-specific sign of distress. After ingesting a problem food, it often means digestive upset or early toxicity.

A pet with stomach pain may hunch, refuse to lie down, whimper when picked up, or adopt a 'prayer position.' Common food triggers include fatty foods (pancreatitis), foreign objects, and toxins.

Sudden hypersalivation is often the first reaction to a bitter or irritating substance — common with toxic plants, alliums, and some medications.

Tachypnea (fast breathing) after eating something unusual can indicate caffeine toxicity, theobromine (chocolate), or pain from pancreatitis.

Polydipsia (excessive thirst) and polyuria (excessive urination) together can signal kidney distress — a hallmark of grape, raisin, or lily toxicity.

Yellow gums or yellow tinge to skin/eye whites means liver damage — a late sign of severe toxicity (xylitol, mushrooms, blue-green algae).

Pale or white gums signal anemia or shock. Onion, garlic, and zinc toxicity destroy red blood cells.

Allergic reactions to food can cause facial swelling, hives, and itching within minutes to hours of eating.

Sudden weakness, wobbly gait, or collapse can indicate hypoglycemia (xylitol), neurological toxicity, or cardiovascular distress.

Tachycardia (fast heart rate) after eating points to stimulants — caffeine, chocolate (theobromine), nicotine, or pseudoephedrine.

Blood in stool — bright red or dark/tarry — needs prompt evaluation. Can come from inflammation, parasites, sharp objects, or toxicity.

Chronic itching, especially with red ears or paws, is often a food allergy in disguise. Symptoms can take days to weeks to appear.

Sudden, unusually bad breath can come from dental disease, GI issues, kidney problems, or recently eaten foods (especially fish/garlic).

Persistently dilated pupils — especially with confusion or stumbling — can indicate marijuana, antihistamine, or chocolate toxicity.

Difficulty defecating can come from low fiber, dehydration, bone fragments, or hairballs. Cats are especially prone after eating bones or string.

Sudden inability to walk normally — stumbling, dragging legs, falling over — after eating can indicate severe toxicity affecting the nervous system.