Our burm was 4 when we got him and @ 9', quite small for his age, but he had been kept on a maintenance diet to stay small, not starvation, but definitely not a lot of food.

He's been with us...a year and a half I think?...and has put on @ 7-10lbs of weight and is nearly 12'.

We've fed him one F/T pig, but he refused our second try...but he's quite happy with bunnies, both pre-killed and F/T. =) Mmm, fuzzies. =)