He was checked by the vet last spring, who felt the lumps were benign tumors at the moment, and were too large to remove. Other wise he vetted clean, and was given the go ahead to be trail ridden. He had a good summer and fall, did tons of trails and had a blast.
This spring he was being ridden and threw a little tantrum, tried to change direction and fell. He seemed fine, but was given a week off just in case.
After that he was fine, back to normal. It was a month after he fell that he came up slightly lame. Looked like the right front. We figured it was just that he got playing to much in the muddy pasture and pulled something. A week later he looked sound, so he was ridden lightly. Two days after that he looked a little stiff after a light ride, and his back was checked. He was mildly reacting to pressure on his withers, a point just before his hips, and mid hip. His saddle has been professionally fitted this year. He was kicked out for a few days, and came in very stiff, and definitely off, although its hard to pinpoint where.
He now has an appointment for a vet check and acupuncture, in a week.
At his age I hate to see anything go wrong. Any ideas of what it could be?