I switched Andy from Nutro to Royal Canin about a week and a half ago. The past few days he isn't going #2 hardly at all. Should I be worried about this? He used to go poopy like 3-5 times a day and he would produce A LOT! Now he is going just once or twice a day and he isn't producing hardly any. Is this a problem or could it be because he is absorbing more food?? Mordy, can you help me out with this?