One thing I would do when I was raising orphaned baby critters would be to make a chart if there were several in the litter where I could record each one's weight twice a day, record how much I got them to eat each feeding, and mark off each one as they urinated and defecated after each meal. It helped to alleviate some of the constant worry to see that they were going in the proper direction, and would give me at least a little warning if one baby was lagging behind the others.
I'm glad to hear that the puppies are hanging in there.
