May appear as a random boss in a Chalice Dungeon.
The Bloodletting Beast is very similar to the Cleric Beast, but a bit more annoying - finding an attack opportunity can be tricky. His attacks consist of paw swipes, fist slams, and long range lunges. In all cases, your best bet is to dodge backwards manoeuvre around him. As far as dealing damage, you can actually dodge right under him and through his legs, opening up his back to attack. Just be aware that he may also stomp at you while back there.