Even though my cat can go out in the enclosed patio and enjoy lying in the sun and watching birds, she still howls at the front door to be allowed to go out and roll on the grass. Flipping and flopping, stretching her legs, peeking up her ears at all the sounds. When birds fly to the birdfeeder or squirrels chirp their displeasure, she runs at the tree, climbs up, and scares them off. Then she runs back down the tree to the grass, tuck up, close her eyes and enjoys her last few moments of freedom for the day.