LOL... sorry I know I shouldn't be laughing... but Sierra does nasty stuff like that all the time!
You'd think that being the Princess that she is she wouldn't like to smell like nasty stuff. WRONG!!!
I wouldn't worry about Molly catching something from rolling on it, eating it is another story!! Just ask little miss priss about the baby rabbit she ate half of and it gave her Coccidia!

Molly was just being a dog, a very nasty, gross dog!!
I hope we get pics of bathtime!!