Not only that but the cats had started sitting on top of it watching the ground underneath. And yesterday the dog was barking at it. That could mean only one thing. There was a mouse in the compost pile. Now I put hardware cloth underneath the pile and the holes are too small for most mice on the side. But the mice are pretty good at getting in. The side has long narrow holes along to let air in. Well they had chewed through the plastic between two of the holes and it made it big enough for the mice to easily get in and out. Now I know mice are impossible to really keep out of any compost system. But I try. And with my kitty early warning system, I can clean it out and disrupt them enough to keep the place fairly free of mice. The other piles aren't nearly as attractive to them, as we only put kitchen scraps into the protected black one. I've never had a cat stalking any of the other piles.
So I turned the pile over into my main garden compost. I put a little of the goo from the black composter and lots of nice dry garden refuse and leaves to separate them. That ought to fix my smell. But what an icky job.