
My dogs sleeping quarters are about 3x4 ft and only about 4ft high and raised of the ground. by keeping them small and off the ground it helps to retain heat in the winter, the lids are also vented so they don't get too hot in the summer. If you are going to have them all together then I would just use your own judgement as long as they have all got room to lay flat out. I use shredded paper for bedding in the winter and change it every day, I find that it is good when the dogs come home from shooting, it helps to soak all the water out of their coats and I change it before they bed down for the night. In the summer I use rubber matting, (the same thing they use for horse stables) This just gives them something soft to lay down on.