Has his hair grown at all? Those Chinese Crested dogs do get some long fur don't they? At least where they have hair it is long. Of course a Rat Terrier has short hair but it IS a terrier! Yorkies were never meant to be foo foo dogs. They were bred to dig rodents out of holes. I guess that is why some of them enjoy digging in their blankets and in the laundry basket!
I don't think you really have to tell him anything has changed. If he is short haired he might need pajamas to stay warm anyway. I think both the breeds that he has in him would tend to get cold easily. He's a little guy and he will still look good with some duds on. I never used to believe in putting clothing on dogs until I got Gracie and noticed how easily she got cold. Now she has a wardrobe.
