I agree that his neck does seem a little short and fat; it could be that he is so young or so fuzzy... I've seen a little growing do wonders for a horse .
For comparison this is my 7 month old colt (as of now he is solid, though my new trainer just pointed out to me he does have some Sclera). He was 13 hands on Wed when I measured him.
I also think my colt has a bit of a short/fat neck and a pretty weak hind end I hope will change some more with age... though doubtful .
Thanks everybody, he is a cutie!! Hopefully I will be breeding him to my big appy mare who kinda looked like your colt FlyinSoLow. The color is close anyway. She is a solid appy. She is the big one on the left.
It's not fair/good to critique a horse that young. He doesn't look good right now. He's butt high and awkward looking - just like they are supposed to be at that age. He'll see-saw back and forth for the next couple of years. Then when he's done you'll get a better picture of his conformation.