I measured his height today and he is 21 inches. from foot to shoulder when standing. He doesn't look to thin to me. He was VERY underweight when we got him. His sister was almost double his size. Found him in an add on an internet classified sight, and fell in love. Didn't have much human contact and was scared to death. It took my husband and I over 1/2 hr to get him to come out of the corner of the barn. He is the runt of the litter, and wouldn't even eat out of a dish. We had to start by scattering kibble on the floor near his dish, then onto a saucer, and finally he started eating out of the bowl.
As Lauralie said, she and Jesse are coming over for a playdate on Sunday...(yay, someone I can talk dogs to that doesn't think I'm nuts!!!) and I am looking forward to her opinion after seeing him in person. I am defineatly going to look into some of the other foods recommended.
Thanks all