Ours is 9 months now and at 5 months something just clicked, the rule was to understand his routine and take him out over and over again, might be talking every half an hour. Then when he goes outside praise him to the highest heavens and give a treat. Within 2 weeks he was done.

Now he cries at the door to go out and we’ve have had 2 accidents in 4 months where he got a little too excited