Perky Pug is a non-combat pet awarded from the achievement Looking For Multitudes. It is mailed instantly to players who get the achievement. It is sent with following note: P.U.G. Dear very patient individual, We'd like to recognize your tenacity in running dungeons with people you probably haven't met before. Hopefully you even showed some rookies the ropes in your pick-up groups. In short, we heard that you like pugs. So here's a pug for your pug, so you can pug while you pug. Or something. Hugs, Your friends on the WoW Dev Team