Ok so my Dad and I have figured out why Jess won't walk on lead, two reasons... Number one is she hates any tension/pulling at all, even a tiny bit by mistake she she won't walk anymore.. Next, and the main one,is that she only walks on grass, I have no idea why..she is terrified of concrete,paths,roads and tarmac or anything besides grass..she literally loves food and is flying through recall,pre-agility and house training, tricks..everything. But she won't go on anything but grass even for a high value treat..she cowers and won't move if I try and walk her on paths or roads etc. :/ I'm confused, I really am. I'm wondering why this has happened, she's trained using positive reinforcement,walked on a harness and offered treats and praises when she walks nicely..I just want to get her over the fear and walking like she walks on grass!!