Don't underfeed the things... not only does it stunt their growth, it F@%ks them up, seriously. I've never power fed one either... the feeding regimen we promote here is just about perfect to keep up with these things fast metabolism. People that think we're feeding these things too much usually only have boas and balls... and maybe a malnourished burm or retic. 9-10 foot seems to be the average in the first year for females, they sometimes hit growth spurts of almost a foot a month.