Some people might resent this comparison, but in many ways, dogs are like young children (smart dogs, that is). Much like children, they don’t mind getting dirty, on the contrary – when playing, there’s one clear rule – the dirtier, the better. They love rolling around on the ground, splashing in a pool of water or mud, and play with sand and dirt. Children don’t mind about getting their clothes dirty, and dogs don’t mind about getting their fur dirty.
Judging by his look, this dog seems like he had the time of his life splashing around in the mud, and he couldn’t care less about his fur getting dirty. And why would he? His owners are the ones who should care, because they’re the ones who will have to bath him and clean the house after he walks in all muddy.