ha, that is nothing! My friends 2 dogs actively seek out muddy puddles and lie in them! One even does a little side roll and it drives her insane.
Makes me laugh ... because my dogs dont do this!
I bought a towel that is sort of like a sleeping bag, it has a zip on the top that you can zip them into and dry them. Amazing thing. Then when they are dry you can just shake the mud outside and stick it in the machine.