My puppy is 4 months old and loves to eat his poop! My husband and I are so disgusted by it, but we know that it is very common in puppies. Of course if we can help it, we don't let him eat it. Anyway, we have tried 2 products ("Yucky Poo" and "Forbid") that are supposed to make his poo taste bad, but nothing has worked... Any ideas?