Eating a small amount of butter usually won't cause serious health problems for cats, but it may cause discomfort such as diarrhea and vomiting. If your cat accidentally eats a small amount of butter, the first thing to do is remain calm and not panic. Observing your cat's reaction is the first step; pay attention to any abnormal symptoms such as vomiting, diarrhea, or loss of appetite.
If your cat doesn't show any symptoms of discomfort, there's probably no need to worry too much. However, if your cat does show any signs of discomfort, you should contact a veterinarian immediately for examination and treatment.
