Good Morning Penny and welcome to Just answer. I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
This scabby back is a common occurnace in older cats. It is caused by over active Sebaceous Glands which are oil glands within the hair follicles. There is no way to stop this production of the oils but it can be managed.
This is similar to a condition calledStud tail in male cats. LINK
Bath Charlie cat weekly with a good shampoo or a waterless shampoo if he does not like being bathed. then brush him daily to keep the scabs at a minimum. This can usually manage this condition.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please Reply so I can clarify for you
Sincerely, Dr. Loretta
Thank you for your prompt reply, It is greatly appreciated.
I will buy some dry shampoo for her tomorrow and will begin the grooming regime too.
Hopefully i will begin to see an improvement - I appreciate this may be a life long regime but can you give me an idea, should there be no improvement, of how long I should wait before I consider taking her to the vet? If I did take her to the vet is there anything other than the treatment you have recommended that they could do if this doesn't work?