Foods You Must Never Feed Cats & Dogs (Some Are Deadly)

All members of the Allium family contain compounds that damage red blood cells — causing haemolytic anaemia. Dangerous in all forms: raw, cooked, or dried powder.

Symptoms: Weakness, pale gums, brownish urine, rapid breathing, collapse.

Found in sugar-free sweets, chewing gum, some peanut butters, vitamin C supplements, and keto products. In dogs, xylitol triggers a massive insulin release → severe hypoglycaemia and liver damage.

Symptoms (appearing 30 min–12 hours later): Sudden weakness, staggering, seizures, yellowing of skin/gums.

Contains theobromine and caffeine. Dark chocolate and cocoa powder are the most dangerous. Milk chocolate is less toxic but still dangerous in large amounts.

Dangerous dose (dark chocolate): ~13 mg/kg of body weight. A 5 kg dog: just 65 g of dark chocolate is enough for serious toxic effects.

Can cause acute kidney failure even from a small amount. Strangely, not every dog reacts — but because it is unpredictable, they must be treated as dangerous for all dogs.

A dog's liver cannot process alcohol. Raw yeast dough also produces alcohol as it ferments inside the stomach. Can cause central nervous system depression and death.

Most adult cats are lactose-intolerant. Cow's milk causes diarrhoea and digestive upset. The cartoon image of cats happily lapping up bowls of milk is profoundly misleading.

Human canned tuna is high in salt and can lead to addiction — cats may refuse other food entirely. Excessive consumption also causes vitamin E deficiency (steatitis). As an occasional treat, it is fine.

Safe occasionally, but feeding it daily can cause vitamin A toxicity (hypervitaminosis A) — leading to bone deformities and liver problems.