PetsBirdsCatsCircusDogsFactsFarmFishHealthRodentsWild 5 Things You Need to Know before You Get A Dog By Matt Wild - November 17, 2015 0 1845 3Beavers Because beavers’ teeth never stop growing, they must constantly gnaw on objects to keep them at a manageable length. Their teeth would eventually grow into their brain if they didn’t maintain them.BackNext