I have to say something that has been incredibly helpful for our kiting experiences is to have a deathknight with you. We have a mage and a deathknight dedicated to chows. The mage slows them down with whatever he can and the DK makes sure that anything that gets too close to him either gets deathgripped or smacked and kited back (keeping it off the healer aggro). This works especially well right before the decimate to snag up any chows which might be especially close.
"If I'm doing a fight and I need more threat... I try harder. If I'm doing a fight and I need my taunts not to miss, then I wear hit." -Veneretio