Jenkins build 155.

Oddly enough, non-aggressive pets are butchered when using plugin commands to kill mobs. In this case, /butcher from worldedit. By default, butcher is set to only kill aggressive mobs unless using the -a flag in the command. However, when I spawn a pet sheep, I can kill it with butcher, no -a flag. When I spawn a normal sheep with mob eggs, it does not get killed with butcher, only the pets do. Is there a way to make it so pets can't be butchered/killed?

Pets can still be butchered, including passive pets with a normal "aggressive only" butcher.