Well, Kacee has pinkish skin, whereas, Muffin had the darker greyish skin color. I am constantly pulling Kacee, the sun worshiper, out of the sun. I suppose the air-conditioning gets cold after awhile, but she'll go outside stretch out in the sun. I will let her stay there for awhile, but I have read in the past that the pink-skinned dogs are prone to sunburn and skin cancer. That is why I have tried to be more careful with her. Now, Muffin was black and she didn't stay in the sun very long. You know how black absorbs sun?