[theBCnut]

Has he always got the Honest Kitchen? Has he had duck before? Duck is a naturally oily meat and some dogs get soft stools just from that. If all of it is something he is used to then he shouldn’t need a transition to go from Primal to MPC at all. Different Primal formulas have different fat levels, so I wouldn’t expect that to be an issue, other than if he isn’t used to duck.