No, Boomer doesn't climb trees but he does other things with the focus Sooner has about the squirrels in this particular tree. I guess that is a hunting dog trait. I need to get a video of it...she does it everyday...I just haven't taken the camera out to catch it, yet! The tree is about 3 feet from the fence, but she is so focused on the crook of the tree where the squirrels sit, I don't think she would even think about it. For instance, Boomer can and does jump straight up....hence the name, Springer, I guess..lol...and his back feet are even with the top of the fence. I used to worry he would go over, but he never does jumps like that unless we are out there, and I think he is so focused on jumping straight up, he hasn't thought to go over....I hope he never does....They both tend to have one track minds.....