Bella, my weimaraner has the same thing on her chest. She also has had it for several months. The black scabby part falls off but grows back. Our vet opted to immediately remove it and send it in for a biopsy. She is going in on Monday. She likes to suntan on the balcony and we were worried that the sun had caused it.
RachelJ, What is a sebacious cyst and how was it cared for?