I am not a fan of retractables. They give you no control. The yorkie should be in a harness only and the 15 lb should be possibly on a chain choker so you can control the walk. They have chain choker with nylon combined. If you are ready to get lessons in heeling email me at
Top Knot Dog Training | Home and we will talk. I give obedience lessons and then we can go from there. Looking forward to hearing from you. Joan