I tried starting them on f/t mouse hoppers (the breeder had already gotten them to eat live pinkies) so I switched to live hoppers for a little while but I really hated keeping live mice. After giving them about 2 months on the live hoppers and weaned mice I was able to switch them both over to f/t rats and now they're both doing great, I can even put them in a separate tub to feed and they have no problems at all. BTW, I feed in separate tubs sometimes so I can spot clean their tub and change water etc, and no other reason. Some nights when I already know their tub is clean I just feed them right in it.