Hi again, Jana, and thanks for contacting me again. I do apologize for the delay, but I just read my email and saw notification of your post.
I found your other posts and agree with Walter's (an excellent dog expert!) recommendations re: your puppy's current skin symptoms, and if her fur is also coming out, in addition to her major flakiness, and you notice a darker color beneath the white flakes, this could be ringworm or another type of fungal infection on the skin. If you're bringing her to the vet tom'w (Sat.) due to her injured leg (poor baby!), discuss the further possibilities of allergies and/or ringworm or other fungal skin infections as causes for her current symptoms. I do hope the Benadryl will help ease some of her itchiness, but clear it with your vet before giving her any over the counter medication.
This is a great site re: explanations of many different canine skin conditions--
If the problem does not turn out to be related to ringworm or another fungal/yeast infection, bathing in an oatmeal or other soothing anti-itch dog shampoo, would be a good idea. I do agree with Walter re: not bathing too often, as it removes the natural oils from the skin and causes dryness. Drs. Foster and Smith makes a nice line of canine skin care products which are usually available in major pet supply stores, in addition to online, and you can see them here:
I too, am sorry you did not find the first vet's answers very helpful and would be glad to notify Administration of your dissatisfaction, but please keep in mind that if you are not satisfied with an answer, you are not obligated to accept it! In fact, I feel so badly that you've already accepted 2 answers on this subject re: your little puppy, that I don't want you to feel you have to accept mine. My primary concern is the health and well-being of your puppy.
Please let me know how she's doing and what the vet tells you tom'w.