After browsing EVERY pet with either Cocoon Strike &/or Moth Dust and found NOTHING
Then I cross referenced any effect that "causes sleep" and I found our old friendhttp://www.warcraftpets.com/wow-pets/critter/rabbits/wolpertinger/
He can have three abilities that can stun, sleep or otherwise cause you to lose your turn...
Unreliable but if you ran it enough, you could have the funniest wow pet battle of all time.
3 of them would be hilarious from time to time but probably not worth it if you want to win