Shaye loves the sun - will lie out in the heat for as long as she can get it. Gemma, being a basenji/sheltie mix and furrier, lies on the cool tiles on the porch, and when the sun hits her, she heads for the A/C. At the beach, Shaye lies in the hot sand in the sun until I get her into the shade, and because she is also a heat seeking thing, wants to be totally under covers to sleep at night. Stands to reason the tris and b/w's would absorb more heat and not prefer it as much as the r/w's do.