New mob

The beaver, its spawns in rivers in a beaver dam and breaks the bottom block of nearby trees. The logs would all break falling to the ground for the beaver (like bamboo for example) they could also give you beaver pelt and you could make a top hat with it, and also it could be used to mine trees like you use foxes for berries. The beaver dams could also change in log type to signify the difference of trees in the biome