Do you see it?

My oldest dog Jumbo is blind and doesn't do stairs anymore. I just carry him outside whenever he gets up now, it's easier on everyone involved. Where those two expansion lines are in the concrete is where I tend to set him down. If you look at this on a large screen you'll see it, I didn't until I leaned over to put Jumbo in the grass. It was cold today so it didn't even move, still startled me. I'll put a more "up close" in the extra....