Crusty Scabs Eating Away At Dog Ear Flap. The presence of crusty scabs on the back of the dog can be caused due to many reasons such as allergies, bacterial infections, fungal infections, hormonal disturbance, and many more. This condition is characterized by thickening of the skin on his ears, excessive head shaking, and scaly or greasy plugs on the ear margins.
Black crusty or ulcerated lump on dog’s ear by: This condition is characterized by thickening of the skin on his ears, excessive head shaking, and scaly or greasy plugs on the ear margins. While a portion of the side effects may appear in the ear channel, others appear on the flap, on piercings and hoop openings.