I did remember to ask my vet when I picked up Bob from his "operation" about whether it's better to do them early or to wait until they're older and he said it was really just the owner's preference. He did go on to say that at 6 mths, some colts may not have both testicles descended yet. He also said that on some horses, they are descended at birth and stay that way, but on others they go back up and come down later. That was news to me. "The Amazing Yo-Yo Testicles"! LOL!
I almost lost my soup to my monitor over that one..hehehe
At the Kentucky Horse Park, there was the sweetest donkey foal. It's momma was at one of the Thoroughbred farms, nursing an orphan foal. A goat was in with the foal. I would have loved to get a pic, but the bars of the stall would have been in the way.