Could be allergies, although it's EXTREMELY rare to see in this young of a pup bc of the immaturity of the immune system at this point.
How did you give the Benadryl? Bc for Benadryl to even have a chance of being effective, you must give it every 4-6 hours throughout the day...bc it has such a short half-life; and you have to try that for a full 10 days prior to evaluating efficacy.
What are you feeding? I would immediately try grain free if you don't have her on that already. I feed Primal or Natures Variety raw frozen; but if you want kibble I recommend Natures Logic, Natures Variety, Wellness Core, Solid Gold Barking At The Moon, Orijen/Acana.
I would get a medicated shampoo, but do *not* use an oatmeal shampoo - it's a myth that these help the skin; they actually exacerbate it and Vet Derms will steer you away from those always.
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |