For the babies, I tried to give mine worms with no luck. Live guppies, though, small and flopping in front of them, got them all to eat. I fed them every two to three days, depending on how quickly they digested and how many showed interest. I moved them onto frozen after the second feeding, and have finally weaned them completely onto frozen. I use silversides, cut into bite-sized pieces (the big ones I remove the spine, so I don't have to worry about bones lodging). I wouldn't rehome them until they are all eating steadily and have shed at least once. I'm having a similar issue with having too many, so I'm decreasing my numbers and their stress by sending them off in pairs.

As for the mother, she should be fine. I increased my feeding times on mine to every three days, to help her rebuild her body fat (she was also sick, so it was doubly important). She's now back on the twice a week schedule with the other adults.

Hope that helps! Good luck! Scrubs are so much fun. XD