Hi Kevin- You’re right there is a lot of debate about whether or not yeast feeds off of carb heavy foods. I don’t think there is a concise answer out there as far as I know. I know that low glycemic foods are recommended for diabetic dogs, which obviously need to avoid carbs. IMO it is not going to hurt your dog to try to feed a low glycemic food to see if it controls yeast better.
Also regular bathing with an antifungal shampoo is what has made a noteable difference for my dog with some yeast problems.