The St. Charles Convention Center went to the dogs. Well, for one day, anyway. Airdales and Aussie Shepherds, Chihuahuas and Mastiffs, Great Danes and Dachshunds moved in for the St. Louis Pet Expo on Oct. 29, along with some ferrets, rabbits, a parrot or two and a several cages of sleepy kitties. The show featured 150 booths with pet products and services, demonstrations, discounted vaccinations, and lots and lots of pet rescue organizations with adoptable pets just begging to be taken home and loved. Next year's Pet Expo will be held on Sept. 29, 2012.