And try to knock down the back fence to get at them as they run up the walnut tree...........

I SWEAR, Prince Ratbone could clear a 6 foot wooden fence.  The back fence where the walnut tree is has an additional 2 feet on it (whoever did it did it weird), but when Prince spots a squirrel, he jumps up on that back fence to about a FOOT below the top.  He's amazing!!  Benny jumps high too, but Prince is something!!  I'll try to get it on video.........

 Too funny. It's weird that you posted this because, since I have been here in the office, there are two squirrels right at the window and Buddy and Dixie have had multiple hissy fits over them. They keep lunging at the window....

Taylor jumped out the window of my CR-V to chase a squirrel when we got home from Petsmart one day.  Luckily, there were no other cars around.

Lucky goes nuts for squirrels too.  We have a walnut tree and two apple trees so we've had more squirrels this year.(the apple trees usually don't bear much fruit, but this year there are plenty. I've also found several piles of deer poop in the back yard)  My dad and I recently got back from a trip late at night.  The next morning I let Lucky out in the back yard and there was a young, small squirrel right  outside the door that I didn't notice. (the young squirrels hadn't been around before)  Lucky pounced on him and I yelled "leave it" and he let it go.  I tried to keep my eye out for them but he did catch and kill one when he was outside without me.  Oscar barks his fool head off at them and will chase them if Lucky does, but he makes sure to maintain a safe distance from them.  I don't blame him,  he's not much bigger than most of them.