I feed Mitzi Pet Gold Light Hairball Control Formula for my not-so-light little hairball . Now that I've got them both on a feeding schedule it does seem to be making a difference. I like this formula because the first ingredient listed is CHICKEN. Pure, unadulterated, fresh chicken. No "by products" for my furballs - they're too precious to me.

http://www.petco.com/product_info.as...ial+Needs&ct3=