★★★★★
Hypothyroid will have the same symptoms and more of yeast/allergies. The Vet will do a thyroid specific blood test that is sent to a lab, University of Michigan is one. A regular wellness panel doesn't check all of the thyroid levels this test will do.
I mention this because I went for years doing all the cures with little improvement for smell, black skin, thick in areas, itchy paws. Went through multiple foods, including grain and potato free. Tried vinegar/peroxide soaks, probiotics and enzymes for suspected leaky gut, allergy meds, frequent baths with all the different over the counter and prescription antifungal shampoos. Dog also became lethargic and sensitive to cold.
Diagnosis came back of Hypothyroid which is treated with Levothyroxine. Saw almost immediate improvement of all symptoms. Dog does have to return to vet to recheck levels for medication adjustment. http://healthypets.mercola.com/sites/healthypets/archive/2010/09/30/hypothyroidism-symptoms-and-prevention-in-pet-dogs.aspx
