My Cat Won’t Eat, Has Diarrhea, and Is Vomiting – What’s Wrong?

There are many reasons a cat may vomit and have diarrhea. Common ones include internal parasite infection, which disrupts digestion and irritates the gut; treat with a dewormer plus probiotics. Indigestion from overeating or mixed foods calls for a day of fasting with water withheld, then active probiotics for three days.

Food poisoning from spoiled or moldy food also causes diarrhea and vomiting and may need emergency vet care. Serious illnesses such as feline panleukopenia, pancreatitis, hepatitis, or nephritis can also cause these signs, so a veterinary diagnosis is needed for an effective treatment plan.