Well, I love horses, so I'm biased in my opinion :mrgreen:
Photographically, this is what I see (I'm no pro, so keep that in mind!)
1. is a nice shot, but could have been improved if it were less cropped, so as to show more of the surroundings. Maybe a sky or something, and preferably less centered. The lighting is great! And beautiful mare and colt :heart: You could also boost the contrast and maybe saturation to make it pop.
I like the angle on 2, but it's really blown out. Also, would have been better if the horses ears weren't pinned, but what can ya do?
3 looks like a nice shot, but I'm not keen on the vignette. Also, blown sky/highlights and a bit noisy. But I love the expression you captured from that horse!