The easiest and safest thing to do is to return to the old food. Why did you switch?
I gave my cat a new food today and he immediately started puking. I am not sure if he ate too fast or if it was the food. He wanted food right after. How can I tell the difference(I threw out the food)
Can you rotate between foods he likes for a while?I am trying to find a food my cat won't get sick of after a week. It's frustrating
Based on my experience with our two picky eaters, I'd second StephenQ's suggestion: our cats get bored with their food very easily so we feed them several brands of raw and canned foods in multiple flavors each. It keeps them eating consistently. They also like shredded chicken and get a lot of Weruva and Tiki.
Can you rotate between foods he likes for a while?