I thought it was odd, too ---> because as you know, we also live in the desert. But one of our adoptees had a "problem ear" that would get swollen, heavy -- and give off a very distinctive smell. The water / vinegar route seemed harmless enough -- and at least a possibility, so I gave that a go before doing anything more exotic -- and although she hated the "treatment" (even though I'd warm the solution a little before dropping it in), she was cooperative -- as if she knew it would help. And it did. (Except for the shaking after, it was a good solution -- no pun intended -- all around.) Your ACV may also work as soon as his ear is healed enough to use it.