"Probiotic for yeast and allergies" usually means one of two different things on a label: either the product is built around Saccharomyces boulardii, a yeast organism sometimes discussed alongside antibiotic and gut-health questions (not the same thing as a dog's own Malassezia yeast skin problems, despite the name overlap), or the label makes its own claim about supporting skin or seasonal allergy symptoms. We're listing both kinds here and noting which is which -- neither is the same as a dermatology diagnosis, and no canine study on this site's strain pages tests a probiotic against yeast skin infections specifically.
Contains Saccharomyces boulardii (a probiotic yeast, not a dog's skin-yeast organism), or the label's own claims mention skin, allergy, or itching support.