I currently give Maddy a bath once every week. Toward end of the week, she'll start to smell musty. Is this a sign of yeasty infection/build up? I'm currently feeding her TOTW puppy, and Nature's Variety puppy before that. Both are grain-free and doesn't contain white potato. I also give her kefir and coconut oil daily. I use Earthbath shampoo and conditioner. Is the smell considered normal for Frenchies? Or should I be concerned about yeast infection?