If you're a serious noncombat pet collector, by now you probably have the Shop Smart, Shop Pet...Smart achievement, which rewards a Reeking Pet Carrier containing a very cute little skunk called Stinker. That was reason enough for me to get to 50 pets, but the owner of WarcraftPets.com (and the namesake of the Dalaran NPC who sells pet supplies, Breanni) had been told at BlizzCon that there was something unusual planned for the wee skunk in a future patch.
I didn't realize it at the time because the savages in my guild are still blowing up Crashin' Thrashin' Racers in raids instead of pulling out their usual pets, but it looks like 3.0.8 was the patch in question. Letters from Birdfall actually got video of Stinker's new behavior: when anyone nearby pulls out a Bombay Cat or a Black Tabby, he falls in love and starts chasing them, only to return to his owner with a broken heart. I'm off to go try this ingame, and suffice it to say that my own version of Pepé Le Pew is going to be out even more than he already is.