Itchy ears

Hello everyone. I rescued two bonded Basset boy puppies the end of June. They are 5 months old. One of them has itchy ears. And they both have hot spots. The lady that I got them from was giving them dairy and peanut butter that wasn’t natural. And the dog food she was giving them made their feces black looking and it was very foul smelling. They have had their first set of shots and have been dewormed as well.

I was wondering if anyone has any recommendations for dry, itchy ears and any other recommendations would be helpful. I’ve never had Bassets before. And all recommendations are helpful. Food recommendations are also welcomed. I am feeding them Purina One Plus for large breed puppy with glucosamine.

I am getting ready to put them on a probiotic supplement and they have been getting flea baths every 10 days. I just want them to feel better. I also have ear cleaning solution and make sure to clean their ears once they start smelling a little off.

Thank you everyone in advance!