My concern is, after he finished running for the night, I checked him all over as of course any owner would and should, and found two lumps in front of his kidneys (so I know there is nothing wrong with them)but right behind where the saddle pad/saddle sat. On each side of his rump. That night (Saturday) around 11:30 was when the whole shebang ended, they were smushy almost like fluid pockets. The next morning they were hard as well, just like they had always been there...I don't know really how to explain it. They were not there before Saturday, only appeared after all was said and done. They are not big lumps and if he wasn't my horse I probably wouldn't have noticed them, but he's mine and I noticed. They haven't grown at all, but it's Tuesday and they are still there. Should I be worried? They don't seem to hurt/bother him as they did bother him that night when touched/massaged. Perhaps just pulled muscles? This was the hardest he has ever ran, as I do not open him up, and only do w/t/c with him. Right now I am waiting on a hip replacement and am not able to ride, that is why I had a trusted friend ride him, she of course feels horrible, but it obviously isn't her fault. Can any of you guys think of what this issue might be???