Originally Posted by gabrielstriumph
He's 8. And he's Morgan/Arab. :)
And thank you, are there any serious problems that can occur because of any of what you listed?
Nothing serious. An upright shoulder can tend to interfere with stride length and make for a choppier gait. Cow hocks are really just cosmetic and as long as they're not substantial, you shouldn't encounter an issue.
As far as his topline, this can be remedied. Just make sure he is using himself correctly. There are lots of good articles around which give a more in-depth exploration into the mechanics of a horse's body than I get accurately explain at this time. People also use hill work, longeing with side reins, and lots of correct transitions to help develop the muscles up there.
And just curious, do you have any pics of how his current saddle and pad fit him?