It was 3e that fully pivoted to small dragonfolk kobolds. But they weren’t exactly dog-people before that. Dog noses were the only dog feature explicitly mentioned in their description, and IIRC there was a module that described them barking or maybe yipping. But they also had scales and rat-like tails. So, up until the 3e redesign made them into dragon-people, they were not fully dog-people, dragon-people or rat-people or anything like that. Just a fully unique creature with a strange mishmash of features.