I have started taking Willie out on a harness. I have a few worries though. One would be when he sees squirrels and birds and decides he wants to try to hunt it should I hold him back or run with him? If he squirrel goes up a tree how do I stop Willie from running up the tree? Can I let Willie climb the tree a little? If something spooks him and he starts to run how should i handle him? And any other tips you can give on taking him out. Also how can I get him to associate the leash with outside and not the door?