Hey everyone I have a question i have a litter of 6 boxer pups and about three days ago I noticed that they were kinda burping up there gruel that we feed them. One has been throwing it up but there still all full of energy and there stool is still solid. We feed them goat milk with puppy food two egg yokes! Can they be rejecting the food now they have grow so much on, do I need to switch it up? And for the ones that say feed on mom not a option because mom killed one and she is not allowed around them! Thanks everyone!