Bo doens't have problems with fence jumping/burrowing. She's easily stopped by a visual barrier like a baby gate, but if she thinks there's an opportunity to take off, she most definitely will. I can't tell you HOW many times we've chased her through creekbeds, the neighbors yards, the park, etc. She get what we refer to as "the trots" where she trots just faster than we're running after her...then she takes off like a bolt of lightening chasing god knows what until she feels like stopping. No amount of shouting commands, threats, etc. will change her mind. I have learned (the hard way) that even though she has good obedience skills and knows EXACTLY what I'm asking her to do, her urge to roam is far more powerful than anything I can dream up.