Aaron Ross, 9, from Ravenswood, W.Va., is greeted by Joey, a 2-year-old Miniature Pinscher at the Pittsburgh Pet Expo held at the David L. Lawrence Convention Center on Saturday. (Photo by Pam Panchak/Post-Gazette) #Pittsburgh #PGH #412 #miniaturepinscher #PetExpo #PittsburghPetExpo #dogs #instadog #PGPhotos