Thanks all! Have been crazy busy with work this week, but was looking forward to reading the replies to this thread!
So I am somewhat reassured, though I hope she will not keep rasping too much of the hoof wall as she moves into more of maintenance trim. With Kodak, she didn't take a lot off, but since Harley had quite a long flare both on the toe, and laterally (only on fronts), she probably rasped about halfway up. It was a little more than I expected. However, she did show me, from the bottom, how he has a very thick hoof wall (the part between the white line and the exterior is quite thick), so hopefully that's why she felt it was acceptable. He is not sore now, if anything, he seems lighter on his feet.
Because he has white hooves, she also showed me how he had a lot of bruising on the lower part of the front of both front hooves which became more apparent as she rasped a bit off the hoof wall. Lots of pink spots. She suggested this was probably because his toes were too long, and the bruising was from the pressure of the hoof wall being pushed up - like a fingernail getting bent backwards. There are no rocks in the pasture, nowhere he might be hitting his hooves so it makes sense, but I don't know enough to know whether this is accurate (so please tell me if it's BS). She would like to see him walking less on his heels, and believes his soreness in the hind end might not even be due to arthritis at all. She thinks that he may have sore heels from walking on the balls of his heel (you can see where they're worn, and it doesn't look comfortable). She also thinks that the exaggerated angle of his hoof may be causing him some muscular issues in the back end, making it difficult for him to collect comfortably. It's not the first time someone has remarked on this. Even after fresh trims, people used to tell me all the time that his hooves were long. And when the vet did the X-rays on his hocks, she mentioned that it would be better for his toes to be brought back somewhat so the angle wasn't so exaggerated, which would put less pressure on his hock.
This equine podiatrist she does not claim to be able to cure him of anything, however, she feels he could be moving a lot more comfortably with a better trim. Thing is, his hocks are fused, so it's possible the issue in his back end isn't so much arthritis (I'm told it's less painful once the joint is fused), but rather muscular due to mechanical issues related to the angle of the pastern / hoof. I don't dare to hope too much, but if this were the case, and if we could make him more comfortable in the back end, it's possible he could have many more years competing, and my daughter would be over the moon!
On a different note, Kodak is continuing to move much better, and she is far calmer than I've ever seen her in the entire time I've owned her! I think the better movement is due to the trimming, but the calmer demeanor may well be due to the photonic therapy that this same person is doing with her (she's also started it with Harley). I was skeptical, but figured it wouldn't hurt Kodak to try something else, however, I have to say I'm a little blown away by the results so far. Now to see if it will last... but if we can get even small improvements in Harley, I'd be so happy! She is even coming tomorrow to do a pre-event photonic therapy session with Harley since he is going to a two-day year-end championship show Sunday and Monday AND she's not charging me for it! She just wants him feeling his best and perform well. I think she's also thinking that if she can improve my horses, word will get out in the horse community that she is very effective (she just moved back here and is trying to launch a business). Nonetheless, I will put together a bag of goodies for her from our garden to thank her.
And I know... I should have taken before and after pics. I have some hoof pictures of Harley somewhere, so they could serve as the before, and I'll try to take pics of him sometime today - though again, I'm a little overwhelmed with work and another show coming up.