Categories: glands

Cat anal sac secretions contain 52 bacteria produced compounds

A recent study tentatively concluded that the secretions of the feline anal sacs contain 127 compounds of which 52 are produced by microbes, specifically bacteria. The compound are volatile. They described the anal sacs as incubators for bacteria.

Position of feline anal sacs

This may interest the scientifically inclined amongst the cat lovers of the world. It is rather specialist information. It’s interesting to me that there are so many compounds that make up the secretions of the cat’s anal sacs.

The secretions are liquid, malodorous and light grey to brown in colour. They can be thick, creamy or yellowish. Anal sacs are scent glands. They mark the cat’s stool with an odour which identifies the particular individual cat and thereby helps the cat to establish his territory. The material inside the anal sacs are gently expressed naturally when the cat defecates through rectal pressure.

In the study the owner of a Bengal cat allowed a veterinarian to manually express the contents of his/her cat’s anal sacs. Each cat has two anal sacs and they are located at about 4 o’clock and 8 o’clock in reference to the circumference of the anus.

Information about the location and the nature of the material produced by feline anal sacs comes from a book in my possession, Cat Owner’s Home Veterinary Handbook.

If you’d like to know the exact chemical composition of the secretions of the feline anal sacs you can click on this link to take a look at the results of the study published online.


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Michael Broad

Hi, I am 70-years-of-age at 2019. For 14 years before I retired at 57, I worked as a solicitor in general law specialising in family law. Before that I worked in a number of different jobs including professional photography. I have a longstanding girlfriend, Michelle. We like to walk in Richmond Park which is near my home because I love nature and the landscape (as well as cats and all animals).

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  • Very interesting article, Michael. I had to read the study and bookmarked it too. 😻

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