I just got home to see this, and THANK GOD he's home!!! Man, I am SO happy for you!!
And yes, locks, absolutely! Our gate is locked 24/7 with a masterlock that is supposedly pick-proof. On top of this, my dogs are never left outside unsupervised, and this is one big reasons why. I sit out there with them each time they go out.
I am so, so, SO happy that he is home!