This totally convinced me. As much as I LOVE Border Collies, and I mean I'm in awe of them...never to get one! They're way too smart for me and I mean that as a height of compliment. Nothing you said surprises me. C'mon, despite your problem, you have to give her credit for tiptoeing in to the room and squeezing between and under a gate to get to her prey! I'm not making light of the situation, just commenting how clever she is! Sounds like she'd make a terrific agility dog.