When he pulled the right front for the second time in a week, I gave up. I rode him with one shoe until my farrier could come and pull the other front. He was never ouchy on either foot. I've ridden for more than a week on barefoot hooves, and he's been sound.
The farrier was out last night and cleaned up the previously shod hooves and then smoothed out his hinds. I was actually concerned about his back feet as they looked terrible. They were heavily chipped, but they look great today, so it must have been cosmetic chipping only.
Here's a quick look at Izzy trotting out on freshly trimmed feet. I am delighted that he's not at all tender footed. He's not exactly moving his best, but this was a cold trot out with no warm up.