We are attempting to train Cassius as well and are running into similar problems. He'd rather chase a leaf in the wind then pay attention to his treat. If you are doing clicker training just be patient. Work in the house, change rooms, then move outside to the yard or the driveway, then onto the street. Make sure he's very comfortable in each environment before moving to the next one with more external stimulus. Also part of clicker training is to click and reward for attention and checking in. Meaning you need to reward him just for paying attention to you and checking in with you when he is doing his thing. We're taking an obedience class now that uses the clicker. I am not sold on it 100% and it is tough because we have a rescue so we don't know how, if at all, he was trained before, and he is 8 months old so he's in his rebellious teenage years. That being said we are going to continue with it and hope it works out. We also have a dog walker a few days a week (my wife and I both work full time and I can't make it home midday everyday) and she is walking him with a European style lead/collar. It is essentially a rope that acts like a choke chain and the leash combined. (it is similar to the leads you'd see Cesar Millan use on his show) We haven't used it yet ourselves because I want to be sure I put it on correctly and use it correctly so not to injure our pooch, but our dogwalker is also a trainer and an instructor and we trust her so we're gonna try it, along with the clicker training and hope the two combined work without being confusing. I'll let you know how it works out.