Cats cannot eat chocolate because chocolate contains theobromine, which can cause damage to the cat’s central nervous system, cardiovascular system, urinary system and gastric mucosa; if a cat eats chocolate, it may cause rapid heartbeat, vomiting and diarrhea, Symptoms such as blood in the stool and convulsions can be life-threatening in severe cases, so cats cannot eat chocolate, nor can other chocolate products and foods containing theobromine be given to cats.