It's pretty amazing what they can swallow.. my albino Burm (she's almost 10' long now) really started growing when I switched her from rats to rabbits.. she grew about a foot, probably a little more, over the last year.. doesn't sound like much for a Burm, but she was about 8' when I got her (3 years ago next month)... and I was told she was about 3 years old then.. making her appx. 6+ years old now.. (she had been grossly underfed and neglected when I 'rescued' her).. now my rabbit guy went out of business and I've had to revert to feeding rats.. gave her a 'large' from the pet store yesterday.. what a joke!