What are the differences between brewer's yeast and nutritional yeast for dogs, and which one is more beneficial for their health?

Brewer's yeast and nutritional yeast are both beneficial for dogs, but they have some differences. Brewer's yeast is a byproduct of beer production and is high in B vitamins, while nutritional yeast is a deactivated yeast that is often fortified with additional nutrients like protein and minerals. Nutritional yeast is generally considered more beneficial for dogs due to its additional nutrients, but both can be included in a balanced diet for added health benefits.