I once lived in Moscow on a compound with an adopted rescue dog. The compound had a shock collar and invisible fence setup. Moscow’s street dogs are renowned f

I once lived in Moscow on a compound with an adopted rescue dog. The compound had a shock collar and invisible fence setup. Moscow’s street dogs are renowned for their intelligence. I have seen street dogs taking the escalators on the Metro. This dog worked out not just that the beeping + discomfort was worth the freedom, but also that he could wear out the battery faster by going up to the very edge of the fence - where the chirps became an uninterrupted beeeeep - and as soon as the beeping stopped, whoosh he was gone.