Hi Vicki,
Yeast infections are nearly always caused by Malassezia, a fat loving yeast. Yeast infections are usually secondary to something that is altering the surface of the skin such as food allergy/adverse food reactions, environmental allergies, hormonal conditions, and parasites. If an underlying primary problem isn’t controlled the problem continues.
Food’s primary role in yeast infections is if the food is causing an adverse reaction. The proportions of fat/ carb or protein in the diet has never been linked to Malassezia dermatitis nor been found to help control it in any way. A food elimination trial could be done to identify if that is playing a role.
This article is a but technical but hopefully you can find it helpful http://www.pinnaclifeanimalhealth.com/sites/default/files/research/Malassezia%20Matousek.pdf
