Squirrel!

There is a squirrel that hangs out in our backyard. Every time Maggie sees him, she goes nuts. She chases him around the yard, bounding and leaping over bushes and plants, crossing distances in the air I didn't think a dog that size could do. Or should be able to do. But that stupid squirrel just runs around the edge of the fence and jumps along the trees, chittering at her; which just makes her more frustrated. He definitely knows how to mock. But every time I see her go after that squirrel, all I think of is Doug, from Pixar's UP. Squirrel! It must be a dog thing.