Cute pictures!

I once took one of my mares swimming, and while I'm not sure that she enjoyed it, she tolerated the whole thing quite well and didn't seem to mind too much. Your horse looks like he is having a blast though!

I really want to find a deep water area with good footing to take my greenie swimming. She loves splashing in water, but the deepest I've found to take her in so far is only up to her belly. I bet she'd enjoy swimming though.