My family is taking care of two orphan puppies, so to feed them they give the puppies the dog milk as they were recommended. They puppies are about less than a week old. We feed them every 3-4 hours. After every meal we make them pee and poop. So lately I noticed that the color of the poop of one of the puppies is green while the other one's is yellow with things that look like really small "seeds" or "eggs". What does this mean? Is there some kind of problem with them or the way we feed them? Should I feed them more often or wait more hours between the feeding sessions? Thanks for reading!!!