Yep my old pastel and my current normal were both on f/t since about 2 months of age. Took food like crazy, then they slowed down. So,etimes every other week. Switched to live and boom back eating like they never been fed.
Switched all to live now that I have a breeder and they all eat no problems. Problems with f/t is that if it's not heated correctly or to your pythons wants they won't eat it.