Do you soak the food? I ask as I have found all mine have gone through a funny stage when they decide they don't like soaked food anymore, so I start giving it them dry. Mine have Royal canin, it is a good food but I also mix cooked chicken, scrambled egg, sardines, tuna, lamb or cheese in with it to make it a bit different. Tia gets bored with the same thing for more than two meals, but my others would eat whatever you put infront of them!