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.
These things are amazing! If you find a wild one, then that’s great because you can raid it’s dam for some cementing paste. Now, if you tame one, the beaver sadly won’t make any dams. But, you can now harvest a bunch of wood with it if you put it on wandering or use a saddle. If you think it’s a bit dangerous running on the ground, let me introduce you to one of the greatest things in this game for gathering, auto-harvest. Just get an argentavis and it’s saddle, grab a tamed beaver, and go up to a tree and let the beaver hit it. ( Put on wandering for the beaver for it to work) This is way safer than being on the ground. To get way more wood, put some levels into melee and even weight if you want to. Auto-harvest also works with ankylosaurus and doedicurus.