Thanks for the tips.

They do get plenty of running and I clip their nails if they don't get worn down, so I probably don't need to worry. I was planning on making a foot print from some drop cloth and will have some extra that I was thinking about using but it sounds like I may not even need it. I'll probably just pick up an extra pad for our lab, the little one likes to curl up at the bottom of one of our sleeping bags. (I'll make sure to keep an eye out for mouse holes, tho :))