Mike has been with me since 20 days old and is a thriving 2 yo now. At 6 weeks he was eating puppy kibble and I would feed him every few hours to avoid hypoglycemia. I also left some food for him every night up until he was 3-4 months old, I think. I stopped doing it only after I could see he didn't touch it during the night. Aside from health checks and keeping up with vaccinations, my only advice to you is to make sure you socialize this baby more than you would a pup that was separated from the litter at an appropriate time (10-12 weeks). Early separation can cause trauma that might manifest later on, which happened to my Mike. We worked with a behaviorist this summer and he is doing much much better, but have I not been so stressed about his health and exposed him more to life, we couldve avoided some behavioral issues. Congrats on your new baby, wishing her health and a fun puppyhood