/edit yet again.
Based on the first link, below, it looks like mez'ng a mob clears the mob off the pets hate list, just as if the mob died. Remove that trigger, I guess?
Owners could definitely sick a pet on a mez'd mob. Pets never before uttered "I can not wake."
couple links for ja:
http://everquest.allakhazam.com/story.html?story=943
http://www.fohguild.org/forums/mmorp...g-down-eq.html