Gut and I have had this disagreement for years----I do not use "Stay", just "Sit"
If your dog was kennel raised til old enuff for you to take possession, it thinks it shud "go" do its "business" outside....not watching or leaving in house too long will break it from natural instinct to "go" outside.
My Ol Abe, BLM, is asleep in sun by dining room door just now....he will be 11 in AUG. He doesn't hear hardly at all, eyes are still quite decent on marking, and his nose still amazes me.....and he spends his daytimes in house with me and I smoke! He spends his nights in a pen unless it is into low 20's (or raining which he does not like and I respect), he then gets to sleep in garage where I have his travel crate....he sleeps in it because it is a "home" to him...with door tied back by bungee cord....just where he wants to go.
Ol Abe's first command was "NO!"......at about 2 months...he doesn't chew on anything, try to get on furniture, jump on guest, but he does crotch sniff which I never tried to break him of--thought it funny, and he never "goes" in "his" house which includes his pen! I have seen him pee for almost five minutes after I was late in letting him out.
BTW, in spite of nutrional advances over last ten years, I still use same "treat" I have always used----I say "GOOD DAWG!"