Beavers can be frustrating. That is for sure.
Check with your DNR for nuisance animal control. Maybe get an anaconda?
i don't kniw if the anaconda would work, I have seen beavers swallow some pretty big snakes in just one gulp
When I was a kid in the 1970's the beavers seemed to have a lot more fur than they do nowadays.....Nary a pelt left on this current generation of beavers......
Mange maybe????
Pics of beaver?