Here is Snoopy, relaxing in the roundpen. You can see, in the foreground, a mounting block. We keep it in the roundpen for two reasons: 1) sometimes we ride in the roundpen, when we start young horses or need a confined space for a lesson, and 2) it covers the hose.
Under the mounting block is a hole in the ground, which contains a faucet with a hose attached. We use this hose to water down the dirt. There's a concrete lid to the hole in the ground, but the mounting block kind of protects the whole thing.
Except when Snoopy is in the pen. Every time I put him in there, when I come back, he has removed the mounting block and the concrete lid. This always alarms me, as I think at some point, he will accidentally step into the hole and break another leg.
Turns out, that's not what I should have been worrying about.
Today, shortly after I put Snoopy out for some play time, I watched Niki walk over with a bunch of hay cubs cradled in her shirt. She tossed the cubes around the pen for Snoopy to find and eat.
"It keeps him busy, so he leaves the hose alone," she said.
I told her I was always worried about him stepping in the hole and that's when I found out the truth: Snoopy likes to get into the hole so he can turn the faucet on.
On one of his playdates, he actually broke the handle off the faucet. By the time Niki checked on him, the roundpen was flooded.
I knew my horse was a land shark. I didn't know he was amphibious.