My cat has been suffering from black scabs on her face, on and off for the past 6 months. It starts on her chin and it slowly spreads to her nose and eyes. I’ve seen 4 different vets and the treatment has always been antibiotics, they work but it always relapses once the antibiotics stops. We have not been able to determine the underlying cause, we are now trying a hypoallergenic diet because the latest vet suspects an allergy, but her scabs and skin redness are still getting worse. Any advice on how to manage these scabs or a way to find out the underlying cause?