Thanks Vaughn! Ill weigh him weekly and see how he's doin weight wise.
Once again this forum rocks! I'm gonna take him to the vet this Friday and have him sexed. And take a poop sample with me if he decides to let go of one for me. Make sure everything is ok. Thanks for the help guys!
I wasn't sure if I needed to go into a rescue mode here and try and feed him more frequently to get him up to a better weight.