Have you noticed this of your dog? While humans like the fresh clean scent, dogs like the opposite scent.
To you as the pet owner, it is yucky for the dogs to do this but for them it is the smell that you find disgusting that gives them delight.
No wonder then that after a nice scented shampoo used in a bathing your dog, your dog will rush off and try to roll in unpleasant smells like the garbage, mud and the like.
Dogs simply like these smells. This is just their normal behavior.
But of course you do not want to live with a smelly dog.
One way to minimize this behavior is to keep your dog in a leash when you take a walk. Train also your dog the ‘come’ command that calls him to you in a foolproof manner.
Give the best care for your pet at Makati Dog and Cat Hospital
Sources:
http://www.pedigree.com/all-things-dog/article-library/why-do-dogs-roll-in-smelly-things.aspx
http://www.vetstreet.com/dr-marty-becker/why-does-my-dog-roll-around-in-stinky-stuff