When yeast has proofed, it has bubbled and started to smell like the familiar yeast smell we associate with baking bread. (gfjules.com)
Their ears should be checked regularly to avoid a buildup of wax and debris which can result in an infection and you got it... a stinky yeast smell! (wideopenpets.com)
@Anonymous ： I lost counts of how many times I used this recipe, but without tasting any yeast smell as a result. (en.christinesrecipes.com)