No coffee, onion or avocado for the dog, please

Not everything that humans find tasty can be eaten by their four-legged friends. Certain foods and drinks are poisonous or, in the worst case, even fatal for dogs, such as grapes or raisins. They contain oxalic acid, which can cause acute kidney failure in pets.Experts have made a list of other foods that can be problematic for dogs:

> Coffee: A substance found in caffeine is to blame. Methylxanthine affects a dog’s nervous system and can even lead to death in some cases. Seizures, trembling, restlessness, hyperthermia, diarrhoea, vomiting or cardiac arrhythmia can all point to poisoning.