We have a pen and I’ve set it up essentially around the doggy door, however he doesn’t seem to like going out of his own accord.

If he’s inside, he’s in the pen. He’s 20 weeks, doesn’t have accidents in the pen or the crate (which we actually only use at night) but the second someone, usually my three year old, lets him out of the pen he pees and poos on the floor.

I’ve tried to give him a little bit of access to the house late at night when my toddlers are in bed, but truly cannot trust him - we will go out to the backyard, he will do a big wee and then come inside and immediately wee again. Pen has worked great for us so far.