An 8-year-old adopted cat has tar black anal sac oil. Why?
Channel: Dr David Sing
Date: 05/05/2017

Yearly veterinary examination at Toa Payoh Vets. This 8-year-old cat was adopted from the SPCA Singapore as a 6-year-old cat. The owner came in for vaccination.  The cat was obese which may lead to diabetes or fatty liver if not careful. 

 Blood test is normal. Dental scaling. Ear cleaning. Anal sacs had black oil on expression. 

The cat was put on a slimming diet. Annual examination is important for many dogs and cats. It is not just vaccination booster only. Few vets examine the anal sac. In this cat, the tar-black anal sac oil was a surprising finding as this cat had only slight hair loss under the tail, yet the oil was tar black, meaning it was present for many years.