Tonight I found about 8 rare fawns and 4 or 5 rare rabbits in about 45m outside Stormwind where everyone duels. It was crazy. And some of the pets were even getting killed by the aoe from the duelers. I've never seen so many pets respawn so fast and so many rares. Anyone having issues with fawns might want to check there!
And I found my rare #5 rabbit!! Elmo's gettin' an upgrade!