At my latitude, and below, where beaver are overpopulated they are bit up 12 months out of the year. The originator of this topic didn't respond as to what kind of "bites" he is experiencing. If the bites are in various stages of inflammation and/or healing, they are the results of fighting. But there is another kind of biting I've experienced, and it is what Ric alluded to. I have had a number of occasions when a beaver lying dead in shallow water has been bitten repeatedly by another beaver, so much so that it usually devalues the hide to zero. These "dead" bites as I call them are distinguishable by the absence of any bleeding, swelling or the like, since the bite occurs after the animal is dead. They are just holes lanced in the hide as if you'd cut them yourself when skinning the animal. Ordinarily if you let the trapped beaver get in deeper water and become submerged this doesn't happen. That being the reason for the extra chain Ric mentioned
Endeavor to persevere.