Mine will be 8 months soon and just got neutered Monday.
They have not been outside yet, it will be Feb/March I guess before I let them.
Since a few years I train my cats with (goats) milk. Whenever I go out yelling "milk milk milk", they appear from whereever they were. Also very effective for cats that go in the basement where they should not be, or upstairs.
I must say, I start this training from the day they arrive, it's really handy.