Moonbow started eating less and not enjoying his kibble as much recently. He also ate some grass and threw up a few times so I thought He may have an upset stomach. He's on no grain Orijen kibble but the main ingredient was chicken. So I decided to try another blend. I tried the fish blend and the beef blend, he loved both. Ate it right up. So I bought a bag of it. Then, this morning I went to feed him the fish blend. He didn't want it. I tried mixing in some chicken, still didn't like it. I waited until 12 noon and tried to give him a bowl again. Still didn't like it. I was concerned of him not eating so I put a little peanut butter in there, then he ate it. lol But I am concerned. I need him to eat more than this, I can tell he is hungry because he'll take treats, bones, peanut butter or cheese. He's having problems with the kibble. Any ideas??