Well, today I got that dog box built. It took a very long time for me to get the door on. It was not complicated, but I just had to get the spring-loaded pins at the top and bottom of the door to match the holes in the box. A couple times a spring-loaded pin came popping out and rolled away, and I had to search for scattered hardware on the floor. But finally, for some reason, I was able to get it together.
To make it more attractive to my dog, I put his bed inside.
Just to see if he understood that this was his box, I told him to go inside, and he did. He wasn't thrilled about it, but he did it.
And this is what it's like with the door closed.
I have it next to the recliner so the top can also serve as a surface for a cup of coffee and the TV remote.
So that's one thing done.