Hi, Welcome to JustAnswer. I am a licensed veterinarian and I'm here to help you. Sorry to hear about Gretal's skin problems Scabs without dandruff could be due to an allergy, but flea saliva allergy is among the different allergens that could be affecting her. A bacterial skin infection could also be the problem. If she was vaccinated in this same area, it could be due to a localized reaction to the vaccine, but because it was itchy, Gretal has perpetuated the skin disease by licking and biting the area. Finally, it could be mites. Since it isn't dandruffy, it is probably not cheyletiella mites, but could be demodex or scabies mites.
The best would be to have her veterinarian check her and do a skin scraping to see exactly what is causing Gretal's scabbing and itching, and then deal with it specifically. Hope this is helpful. . .please let me know if you have any further questions or concerns.