The Dog Who Never Gets Dirty

Several times I've commented here on how CLEAN Mama Raven stayed during the whole whelping process. And how CLEAN she has remained. Now I have proof of her dirt repelling abilities.

The other day she was outside in the wet mud with all the other dogs. Here is a picture of Babe:


There are similar pictures of Kelly, Aliy and Ilsa over at Babe's Blog.

Here is Mama Raven:



How does she (not) do it?