my appaloosa has a cresty neck... he's always had it and the vet has looked at him many times. She said he's not overweight and it is just where he stores his fat but I can have his thyroid checked if I would like. I didn't have it checked yet but I was just wondering if he has a cresty neck, does that ALWAYS mean he will founder or is it just a place where he stores his fat. Also, his crest isn't real hard and in the spring it MAYBE got a TAD harder if anything at all but she said that's okay because he's eating more grass and he doesn't need a grazing muzzle. I have some pics here but idk how much you can get from them. I'll try to take some tomorrow that give a better view of him.