Is my ball python to thin?

Ive been looking at other peoples ball pythons and now im concerned mine might be to thin.....I feed him an adult mouse every 7 days and hes about 20-24 inches long....so is he to thin?
http://i253.photobucket.com/albums/h...5/100_0071.jpg
http://i253.photobucket.com/albums/h...5/100_0069.jpg

this is also my first snake

He's not thin, but he could get a little beefier.

How old is he?

I have no clue but for sure under a year if I had to put a number I would say 7 months....I got him as a gift from a store owner who had to many snakes

In that case, I think he looks good. I would think about moving to rats soon though.

ok thanks.....I guess this weekend ill go stock up on some rats before I leave and is feeding him every 7 days fine? or should I feed more often

He looks good to me. Some bps are naturally a bit skinnier, no matter how much they eat.

No, don't feed him more often. If he doesn't like the rats, you can also see if he'll take a second mouse after he's done eating the first.