I love to sit at the breakfast bar in my kitchen and sip my coffee and watch the wild birds at my porch feeder. Then I watch one of my dogs, Blue, try to do a header through the glass sliding door to reach them. She gets a concussion each time. To be honest, I’m surprised she hasn’t broken the glass yet. But she seems to be catching on. She sees them now and heads for the door and then tries to put the brakes on as she reaches the glass. Unfortunately, I have a slippery floor so she can’t always stop in time. Oh well, eventually she’ll figure it out.