Muskrats will chew on foam blocks. If I were going floating dock I would go with the blue barrels or some sort of commercial product for flotation. Do folks in this area pull their docks to protect them from ice damage, or are you far enough south where that's not necessary?
Yep, there are muskrats around there. Didn't think about them. We do get a fair amount of ice. But in the last 10 years not enough to do any damage. Most leave them out on that lake.