[SoCalyorkiLvr]

I would get a small xpen (too small to really "play" in) and put it outside in an area safe from hawks or whatever but where you can see it from the house. Take him out when it should be time for him to poop (usually early morning and late evening, or for puppies, after they have eaten)and give your command..."hurry up" or "go potty" or whatever you say. If he doesn't go, back up few steps and keep repeating this until you are back in the house. Continue to watch until you see him go and then run out and praise him big time and take him back inside!! Keep doing this for several days and it won't be long until he figures out that he is not coming out of the xpen or getting any attention from you until he goes potty.

Another idea is to tether him to you, hook his leash to your belt loop so he stays with you in the house and as soon as he starts to do the "poo poo" dance (they all have one) take him out to his poo poo area and praise him big time when he goes and give him a treat.

Good luck.