I am currently transferring my kittens onto Grau kitten turkey n carrots. What I would like to know is when should I introduce other flavours? They are on about 80% Grau and 20% old food. Once they get to 100% and ok for a few days I was going to try them with another flavour from Grau. I also have mac and onnomnom but unsure when to try this. Thanks for any advice.