So a couple of weeks ago, we successfully switched Chewie from Whiskas wet food to Blue Buffalo Wilderness kitten food. He's been eating that no problem, and we also have been giving him some plain cooked chicken at night, for dinner. The last couple of days, he hasn't been eating his food as much, so we gave him some Whiskas to see if he would eat, and he ate that. Today, he tried to steal a cookie, and I have no idea where he even found a cookie. I really hate feeding him Whiskas, because it makes his poop smell. He also has just been odd lately, some of play aggression has gotten worse, and we do really play with him. He also has been climbing on EVERYTHING. He has a cat tree. I have no idea, but all of this started when he started eating less of the blue buffalo. Any ideas?