So my puppies are 3 weeks old and the mom is seeming like she doesn't want to feed them as much as they need, so I'm supplementing with orijen puppy food and baby formula as directed by my breeder. My question is: the puppies are wild about the pup mush, but how much do I feed them? Until they are full? They seem to be responding but I'm worried they will eat too much and vomit. Any suggestions? I'm going to guess they eat about a quarter cup each feeding, 2 or 3 times per day.