Honestly, I don't think there are enough probiotics in yogurt to be of benefit, unless you are eating a TON of it. I'd go with an actual pro biotic capsule. I use Primal Defense Ultra by Garden of Life. My dog also has a history of yeast infections. I am on a FB group for yeasty dogs if you are interested in that. They have a ton of homeopathic info to offer, only thing is they are pretty strict that feeding raw is a must (which I do feed raw and agree it helps), and they don't like using any prescription meds ever (which I feel sometimes it definitely is necessary). If you are interested in joining let me know, even if you just want to join to read their posted docs, and read what other people are saying.