Some dogs are very smart, and others, not so much.  Why is that?  Could it possibly be the scented dog shampoo that their loving owners use regularly? Like us humans, animals can react to toxic chemicals, feel stoned, confused, weak, disoriented.  But the poor dogs can’t verbalize this.  So they roll on the ground in the most disgusting rotten garbage they can find.  They want their natural scent back, but just when the smelly shampoo is wearing off, guess what?  Bath time.