Dog Boots for a Seadoo

I've got 2 border collies that I know would love to come out on our ski… Probably 1 at a time. I've been looking at life jackets, boots & googles for them but haven't really found any boots that seem like they would be suitable to for them to swim in too.

Given they might jump in off the ski, I still want them to be able to swim around a little. Does anyone have any experience with this or recommendations for suitable boots? I'm mainly looking at boots to prevent them from scratching the ski.