I took my sister - in -law's dog for a walk onto the fields near me when I look after it. I used to have a dalmatian who used to come back from the woods filthy - he used to find the deepest, muddiest hole to jump into and then shake himself all over you. I'm sure he did it on purpose just so I'd have to carry him up to the bath and then get the bathroom walls & ceiling plastered in mud. But that's just dogs.
