It would be nice to have Multiplayer Support added, to avoid Friendly Fire between two (or more) players who may be on the same team.
What I mean by this, is on a server or LAN game with a mod (or plugin 'sponge') where a player would be unable to damage another player, the dogs can still be damaged and/or damage the other player.

A check to see if Damage would be prevented between owning players would be enough I think to prevent the dogs from engaging in this unwanted behavior as well.

Actually, someone in the community discovered the trick to get friendly fire working on servers is having the Obey Others setting turned on and having Friendly Fire off. You can see here