Thank you for all the great responses! She did get her teeth cleaned, and 2 baby teeth pulled (they never fell out), and was on antibiotics for that.
The vet didn't tell me specifically what "yeast type" it was but that allergies triggered it.
She is eating Purina EN diet that the vet recommended (I buy that from the vet).
She has been eating this for a year now. It has corn,
wheat

i have heard it was bad...
What recommendations do you feed your furbabies??
Thanks everyone