Eating too much?

My Donny is about a foot long, born April 2010, and I feed him usually once a week. I feed him the adult size white mouse, which is still pretty small, but he will usually start eyeballing me (or my cat) like he is hungry usually a few days before I feed him, and acting hungry. I wonder if his food is too small, but don't want it to be too big either... Suggestions?

Should be as big around as the widest part of his body. If it's smaller than that, may be time to try to move up to crawler rats.

I appreciate it. I just fed him two days ago and he is tracking my hand and stuff. Haha. Hrm...

I feed my hatchlings every 5 days for at least the first year. They appear to appreciate it, lol.

When they are that young you can feed more then once every 7 days. I personally try to aim for 4-5 days, but you can also watch the "food lump", when the food lump goes away, wait a day or two after then you can feed again.