Well, that's a bit misleading. I noticed Koji doesn't judge jumping up onto my deck very well in the dark. We have a light, but it's not super bright, and the back door is lit from inside. I was thinking about stringing up christmas lights on the edge of the deck so he knows how to judge it, but wasn't sure if it'd be too bright and make it worse. I've attached a picture of what our deck looks like. The left side that you can't see has stairs that he doesn't use (or rarely does), the front left is typically where he comes up and misjudges it. The front right, he sometimes comes up, but not often. He comes up on the right, but seems to judge that okay. Thoughts? He's misjudged it a few times and I'm worried he'll hurt himself.