After breeding friend's dogs, new puppy attacks me.

Playing with my brother. whenever he breeds 2 of my dogs, the new dog/wolf will start attacking him no matter what. When my brother kills the crazed puppy/wolf, The game notification says "wolf was slain by "user" .

Steps to Reproduce

1. Player 2 joins world hosted by Player 1
2. Each player tames one dog / wolf
3. Make sure both dogs are in standing position and close enough to breed
4. Have Player 2 feed both dogs (bone, cooked beef, mutton, etc) so they breed

Observed Behavior
Newly born pup will immediately attack Player 2

Expected Behavior
Newly born pup should either be neutral toward Player 2 or friended by Player 2 since they did the breeding.

Issue also occurs if both wolves have been tamed by Player 1 (the non-breeding player).