[yorkietalkjilly]

He just doesn't like change and probably learned to poop in the dry grass or dirt from the beginning, now here is something different. Leash him if you must & don't permit him to leave the dewy grass until he has gone on it. Be the soul of patience at this point & don't get perturbed that he endlessly will try to leave the area or just lie down. Walk him around a little bit, then back to his potty spot. Be prepared for a long wait the first time & maybe the second so take a little plastic stool or blanket to sit on or just stand patiently. Patiently. Patiently. Patiently. You have to gently show him the dew is not so bad & after he's been in it a few times, he will desensitize to it & go just like normal. If you prefer not to leash, just prevent him from going to the back door with your hands, or, each time he does, get him & take him back to his potty spot, showing NO signs of frustration - just matter of fact attitude. Mommy is teaching baby - it is very repetitive until they learn every trip to the back door to get away from the dew only results in a trip back to the dew.

Or, give in. It's as simple as how badly you want to teach him that change is something he must learn to accept & deal with, even if he doesn't really like it, or you can accede to his wishes & find another way to allow him to poop when it is dewy.