my dog used to do this ...... he soon learned when he got a scrape from the barb wire , not the best way of him learning but it worked........ my young pup started kicking off the mesh in front of her run while we were teaching her so i just lowered it slightly and she stopped then highered it after a week ,clearing the small jump must of built up her confidance, now she will clear 4 ft without touching it and she is only 8 month old.