My black lab uses Eddie's Wheels for supporting her hind legs, and motivates with her front. But her front "elbows" are having problems, and I want to work on motorizing the rear 12" diameter wheels to help her. Speed range desired would be 1-5 mph If one revolution of the wheel is 38" of movement on the ground, can any of you recommend a friction drive motor that may be appropriate? I have a home fabrication shop with bench lathe, milling machine, weldes. This dog has been dealing well with this handicap for three years now. Tried a DIY underwater treadmill but she never did get her hind legs moving again after the spinal injury. She seems realtively happy, having adapted to her new life on wheels. Photos attached. We tried a three wheeler which might encourage her to use her hind legs to get a doggie treat, but no good.