At this time of year i'd be doing none! Now the season has ended my advice would be just let your dogs enjoy the spring and summer months with nothing other than just the daily walks and a bit of swimming when the weather becomes to warm (here's hoping) lol.. a period of rest is just as important as any other aspect when it comes to lurcherwork,getting a dog fit is easy,keeping it fit and at the top of it's game for several months is the art of a good dogman/woman..there is some sound advice on how far and at what speed to trot the dog behind the bike on this thread so imo there is no need to