I'm pretty sure its with all Un-hostile mobs.
There is no command to let every1 on meep kill your pets without making it so they can destroy your blocks
(/plot toggle destroy on or something like that)
An example of this is my Rabbit grinder.
I wanted to have a public Rabbit grinder to attract people to my town but noone can attack them unless I make it so they can destroy blocks aswell..
Suggestion: Add a command like /plot toggle Rabbits on or /t toggle Rabbits on.
(Couldn't think of a /plot toggle *something* on thing)
10/10 Suggestion, Accept it.