[QUOTE=jsydney5;8424865]
If that’s the case, do you mind sharing two or three of the examples where the foals have had issues? I’m genuinely curious, not trying to be a smart ass. I’ve searched, researched, and searched again. Can’t find enough conclusive evidence. Thank you!
added: specifically a horse with mild hock arthritis passing that down to their foals.[/QUOTE]
Not really 
But it’s a proven fact that certain conformation traits lead to the (earlier) development of certain things.
Small feet and/or upright pasterns - not uncommon in the halter-bred QH world - are directly linked to the increased development of navicular issues.
Straight(er) hocks are directly related to the (earlier) development of hock arthritis and the breakdown of the suspensory ligaments.
Straight(er) stifles are directly related to the (potential) development of locking stifle issues, which leads to the potential for arthritis in the stifle down the road.
Long sloped pasterns are directly related to an increased risk in tendon/ligament injuries.
It’s just a function of how the horse works.
When those conformations are passed to the foals, they too have those increased risks. That’s how breeding works.
That’s different from a well-conformed horse having a genetic problem with early-onset juvenile arthritis - whole 'nother ball of wax
If you will be happy with the not-insignificant odds of having a duplicate of your mare, conformation and all, early arthritis and all, then go for it.