Man, my cat will only eat 1 type of food. I moved her from Thailand to the US this year and we don't have the same food I was giving her (probably full of malomine). I had to introduce her to new food and she didn't take it for about 3 days. I got really worried and went out and bought 3 more types of food. Luckily she took a liking to a healthier food. But I am not trying to change her food at all.Sometimes our cat gets really excited when we introduce a new flavor of canned food. We only give him a little bit of canned food each day as a treat and to break the monotony of his kibble.