Im not sure if yorkies in general are supposed to stand bowlegged. My yorkie IS bowlegged unfortunatly which has caused a medial patellar luxation (vet terms), basically because the bone is curved its causing the tendons that hold the knee cap in place to pull abnormally towards the middle causing it to slip out of place. The vet has told me that over time if his knee cap keeps slipping it will eventually stretch the tendons so much that it will require surgery ($3000.00 per knee
). Anyway that didnt really answer your question but thats all I know about my bowlegged yorkie.