Carmella had laryngitis a couple of months ago. I took her to the vet to be sure it wasn't something serious, then put a teaspoon of colloidal silver in their 2-gallon water pot at night for four or five nights, and her voice slowly came back. If your little guy is improving on his own, I would wait at see. My guess is Carmella either swallowed a hickory nut or Bean hopped on top of her with her neck over the side of the pool or something like that, and it was a physical injury.