In my experience, they don't care about the floor as long as they are warm. He will center himself on the Kane mat and not spend much time at all in the rest of the box. I would use whichever flooring is easiest to clean because he is definitely going to make a mess.I will adjust as recommended. I can make the opening smaller very easily and still maintain the aesthetic I am looking for. It might look even better. I plan on adding the clear vinyl flaps as well. I have been looking at Tom's posts and think I will get the radiant heat panel and the Kane Mat to add to one side of the house with the thermostat on the cool side. I definitely can keep the pavers as they are, but I though he might like it better with a dirt floor.
I have the 27 x 48. There is still room for him to get off it if he gets too hot.Hmmm. If he is going to center himself on the mat, I wonder if I should get a wider mat than the 18". If I get the 18 inch wide mat and push it to the side, he wont really be able to get totally centered...