It varies. As long as he doesn't look like a tent shape(under weight) (there's a theory that if you were to cut the snake in half, it should look like a loaf of bread) or round (over weight). As it is only six months it isn't going to be overweight.
1.0.0 Corn: D-Bo (Amel) 1.0.0 Western Hognose: C*ntyB*ll*cks 0.1.0 MBK: Rosa 0.0.1 Leopard Gecko: Zuko 0.0.1 Bearded Dragon: Kobe 0.0.1 Fire Bellied Toad: Snoop 1.1.0 Cats: Penny and Sheldon 1.0.0 Staffy: MooMoo