My 6 month old kitten has the most awful, foul smelling poop. He's dewormed and to date with all of his vaccinations. He's been on the same brand of wet food since he was 8 weeks old and he eats 3-4 times a day and drinks plenty of fresh water. As far as frequency, size and consistency, his poop is normal, it just smells extremely foul. The smell actually clears the house out because it's so bad. Is there anything I could add to or eliminate from his diet that will help control this??