He is a cutie. It may be the way he's standing, or the way his feet are trimmed, but in the third picture his front feet look like they turn in a little. He doesn't look like he's standing too comfortably. Of course it may just be my eyes...I can't see worth a daggone tonight. I think he has kind eyes, and from what I can see, his weight looks good.
The biggest thing that pops out at me right off the bat is he looks like he's uncomfortable. He looks like he's tucking his tail and popping up his back because something is sore or is bugging him. He's got a nice chest, good muscling all over, and I like how much bone he has on him. He looks like a very nice very well cared for horse, except for the fact that he's popping his back and tucking his butt.
He does look like his toes are turned in a little. I work with harness racers and can't even say this would be something from the way they are shod. They still should have nice straight legs right down to the toes.
Although he is tall he seems rather short in the body for a standie but having said that, there seems to be more than one set of conformational rules for standardbreds. There are the leaner, longer ones and then there are the more heavy set, more compact ones. I have found though that overall the leaner, longer standardbred has better range of movement and will always do better at the races :) I know your horse isnt a race horse though so this means nothing to you but yeah, just though id add that :)
All in all he looks pretty well put together. The only other things I would say is that for some reason I don't like the way his neck ties into his shoulders but that could just be me ;) he also looks a little camped under in the front. He looks a little sore around the back end to
But he looks just lovely and those things mentioned are minor things :) its rare to come across a perfectly put together horse :)
"Hunter's bump" is extremely common is SBs, partially because typical SB conformation predisposes them to it, and partially because pacing at racing speed is a terrific mechanicsm of injury to cause it.
I can't really tell from the photos whether it's hunter's bump or a roached back, but I suspect hunter's bump because of the horse's history. I also agree with the poster that commented on how uncomfortable he looks, particulary in the first and last photo. Might be because of other factors (cold, standing on asphalt) but I would definitely get his back looked at by a vet or chiropractor.
The other thing that jumps out at me is his front fetlocks - pretty typical for a SB that's raced, but those fetlocks are pretty thick and puffy.
Positives are a wonderful shoulder, attractive head and neck and a neck that ties into the shoulder well. Broad powerful chest. Both fore and hind legs reasonably square and straight.
Nothing here (other than the back) that would keep him from being a happy, healthy pleasure horse.