Good morning! I am somewhat new to the page and I have an issue with my dog. He is a rescue - turns 3 yrs old this month and I got him this past Easter. We have been to 2 basic training type classes. My issue is him on walks. I have tried many different harnesses/collars etc but only found that the prong collar is the only one he stops pulling on (of course I only have it on when we are walking the neighborhood). Anyway, this morning he slipped the prong collar and took off after squirrels (he is very high prey). Okay fine, but then he won't listen to come back to me. I live off of a busy street and he ran straight towards it at full speed and turned at the last minute. He was 'free' for about 10 minutes before I got him pinned in a back yard and then only got him when he stopped for his morning potty break. Can you recommend any techniques/classes/places to run him that are fenced in? It has gotten to the point that I don't want to walk him anymore in fear that one day he will run out in front of a car. Any help is appreciated. thanks.