Wolves do not heal properly. Upon being given any type of meat (uncooked, rotten, and cooked) they enter breed mode, regardless of their health. You can tell this by the state of their tail. Sometimes, when you exit the game and reopen it, the tail goes back to the highest position, but the dog still is on low health (you can tell it by the whimpering sound effects, and they also die pretty easily), however, this doesn't always happen. This makes wolves very annoying to deal with in this beta.