Four cats and a dog. Seriously!
This household had done a great job of adapting to their feline needs. There is tall, solid cat tree in every large window. The pool table has been converted into the Feline Feeding Location (remember the dog?). A closet has been converted into a very tidy sand box and pet supply storage room. All of the carpet has been replaced with hardwood, a compromise because one of the cats has a peeing problem.
These cats were awesome!
They have a Jumbo Cat Ball, and I went over to visit them so I could see how they use it. I had already heard some really funny reports:
So the heat just came on, and Flanders and Eisen dashed across the room and basically leaped into their cat ball. Now I finally understand why it keeps ending up in this particular spot no matter where I move it!
They always move the Cat Ball to this location!
See how the Cat Ball is perfectly lined up with the opening right on top of the heat vent? When the furnace kicks on, hot air will blow right into the Cat Ball! It keeps getting better, because this spot also gets sunlight. What clever kitties!
These kitties also drag their toys into the Cat Ball. It sounds like there are usually a few plush toys in there with them.
They take toys into the Cat Ball.
Look how they smashed their Cat Ball! Now three cats can enjoy a cuddle in the sunlight while also getting the hot furnace air blown over their fur. 
Household tip: I learned that the plastic device placed over the heat vent not only helps to direct heat, it also helps to prevent the naughty cat from peeing into the heat vent. Seriously, the last thing you want is cat pee inside your furnace ductwork.
I really enjoyed all of these photos! Thanks for sending them!
I love these cats and their warming strategies. They created a spa Cat Ball