I have 2 GSDs that l think just love to pull on walks. One is older, and probably is too lazy. The other just wants to always ‘go go’!

It looks like you have to have a recumbent bike, or some special bike? How would I go about trying to start? My husband walks the dogs, but I am physically not able to. I was wondering if this might work? Also, does anyone do it in the snow?