These beavers have become one of my most used "Dino". Their ability to hold wood at 25% weight and stone at 50% weight comes in handy when building. I recommend lvling weight and breeding high lvl beavers. Breeding is very easy. Once they are born and imprinted let them wander around bushes in a protected area. They will passively collect berries to their full weight capacity (full as in once they're grown). This means they are self sufficient even in the baby stage.