I have a now 3 year old Vizsla. We go to the dog park 3-5 times a week where she is able to run to her hearts content. We also walk several times a week and have yard time everyday for toy playing and agility training. Recently (last 2 weeks) she has started to jump the fence and just take off. She comes right back when called but I am alarmed at her desire to go on unauthorized self walks. Her food is the same and she has no medical issues. Anyone have experience with this kind of issue?