Here'a what I can see and remember without scrolling back and back throught the picures and tiliting my head from side to side for the pictures in various orientations (hint hint) . .
Mare is camped out behind and her stifle is really steep. Her hindquarters are under developed and the connecting area of pelvis to spine looks a litte crooked, which jives with her legs being camped out behind. It looks like maybe, just maybe, her hind end might be oiut of alignment and might benefit from chiropractic. But one cannot really tell all that just from photo. She does't have much abdominal muscle tone, so her back kind of sags. Her shoulder is good, neck a bit short and thick. Her pastern angle doesn't match her hoof. Hoofes are low in heels and long in toe. not good. Her expression looks a bit pained. maybe feet? maybe bug bits (use Swat?)
Baby is better conformed IMO. He has what looks like maybe a little crooked front right knee, but since photo is not straight on, hard to tell. Nice hind end on him , cuter than crazy face, neck set on a bit low, but so hard to tell with babies becasue they grow all wonky.