Hello there and Welcome to the site! Glad you started posting b/c you have 2 gorgeous bullies! Pyoderma is a bacterial infection on the skin and could be causing the foul smell. The scabs in his toes is probably from intergential cysts..What food are they currently eating? He will need antibiotics for the ear infections and pyoderma and anti bacterical shampoo to help. Soaking his feet and then powder is perfect to do His eyes could be due to the allergies.It sounds like the yeast, feet, ears is all b/c allergies and the food could be a key part to all of this. There will be others by with more advice Hope this all works out! Thank you for taking these 2 sweet babies into your life and giving them the love they deserve.