Sensitive cat has soft stool & lost weight after food switch. Vet?
Cats, unlike dogs can eat only meat and be fine, as they are obligate carnivores. Dogs can actually be fed a vegetarian diet but cats cannot. If she was doing well on the previous food then transition her back if you want, or you can give her a little more time to get used to the new diet. You could even transition her to a completely canned diet. If you changed her abruptly from one to the other, that could be what started her problems, especially if she has a sensitive stomach. Since she's eating fine I don't think you need to rush her to the vet just yet, as long as she seems well otherwise. Decide what food you want to feed her long-term and transition her slowly from her current diet by offering her some of each dry food in two separate bowls for a few days. Then put 75% old food/25% new food in the bowl together for a few days. Then go to 50%/50%, then 25%/75%, taking a few days each time. Gradually reduce the amount of old food until she is completely fed the new dry food. If she gets an upset stomach, you can back up a step and hold there until she feels better. If she loses her appetite, starts vomiting, becomes lethargic, then do get her in to see your vet as soon as you can.
Updated on September 23rd, 2025