My guys have complete access from the second floor of the House, all the way out to the end of the Property. I have a Doggy Door, very secure yard from above and the sides, and that's basically 24/7. There are brief periods in the early evening I don't let them go outside, since I host a Possum and one stray Cat, which live somewhere else and just visit for the scraps.
My new Pup Ichabod was going outside reliably to potty at about four months. Have two adult Dogs and it's really nice to have teachers like that.
