lab skin

Question
My  chocolate lab is 3 .She has developed spots on her back and around the top of her hips .She has scratched and chewed them bare .Her paws are itchy .We have had a biopsy completed nothing on learned she is on meds 3 weeks no change,we have changed her diet rice & meat& veg.She does not receive table food .We have moved with in the last year.If you have any ideas we are open.FRED  

Answer
Sounds like diet problems.  I personally have seen thousands of Labs eating Pro Plan and none of them have such problems.  I am also familiar with other programs feeding other common brands with similar results.  

Feed a decent chow, brush regularly, and bathe seldom if ever.