Finally, a subject I know a little about.......rah rah......
Hannah gets yeast infections on a regular basis. First it was a rash on her belly & now it's primarily in her ears.
The foods to avoid are: carrots, peas, cottage cheese, taters & sweet taters. Here's a link to everything you ever needed to know about yeast:http://www.nzymes.com/pc/viewContent.asp?idpage=16
And you are so right about a grain-free food.
I have used their yeast kit more than once & continue to use some of their products now. Always worked well for Miss Hannah.
I also think once a dog has a problem w/yeast, it's an ongoing problem.