If you continue to work/run your dog on hard surfaces like that you will have a lot of problems. If I have to bike on the pavement I only let my dog jog/trot and never any long distances. Even on dirt trails "if" I let her run its not for long.
Apache - Shiloh Shepherd 12/15/02 - 6/9/15
Kiya - Shiloh Shepherd 5/15/04 -12/19/25
Lakota - WGSD 1/13/10
Wolfen - WGSD 12/31/14