I agree with the post above. For the first three feet you should have been feeding it every three days. And chicks should only be used to feed a starving snake that will not eat. At five feet, I started feeding mine small rabbits the 1 lbs - 3lbs and I feed her every five to seven days. I would get off the chicks and go to jumbo rats or small rabbits, prefreably rabbits since that is what he will be eating. It is said that burms grow throughout there lives, so it should grow, but maybe you just got a little one. Nothing wrong with that if its tame. I am sure if you did not want it, and you told people how old it was someone would want a small burm.