Secret Dirt bag

I have discovered today that Millie is a secret dirt bag. She went out with Barbara (nice dog sitting / walking lady) and came back 2 hours later after having a swim in a very dirty river. Apparently she went in with her coat on and everything. She is filthy, and when I say filthy...I really mean it. I am thinking now that perhaps I shouldn't have got a white dog. Now she is rolling and rubbing herself all over my pale beige wool rug. Lovely.