My 18 year old cat has a sebaceous cyst on the back of her neck. Because of her age, the vet won't remove it as she may not survive the anaesthetic. Because she scratches it, the cyst is open. It dries up and forms a scab but it fills with blood and pus and then she inevitably scratches it again and I end up with a big scab and lots of blood over things; usually my bed!. I will quite often take the scab off myself and clean the wound with colloidal silver so that I don't end up with scabs and blood all over the place. Does anyone know what i can do to a)cure/get rid of the cyst or b) reduce the amount of scab and goop from the cyst??