I have a question about a border collie he is 17 months he doesnt get enought exersise and want to take him to the park but he fights when i take him (he got attacked when he was 7months at the park) any tips anyone can give me on how to fix this would be greatly appretiated. also i want to start running him on my bike but would like to get one of those special leads but i dont know where to get them or what they are even called. i live in Lee county FL( sw florida).