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Why does my nursing cat's nipple smell rotten and look brown?

Updated On September 23rd, 2025

Why could a breastfeeding cats nipple skin smell rotten and a brownish glossy looking color. She is on antibiotics for unknown sickness. The antibiotic is called Clavamox and she started breastfeeding again yesterday.

1 Answer

Most Helpful Answer

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Answered By Elva Ma DVM

Veterinarian

Published on February 12th, 2018

Hello, and thank you for your question. I would be worried about mastitis (mammary gland infection) based on your description. Are the kittens nursing from that nipple? I would try to encourage them to nurse from all mammary glands, and if the problematic one is not being emptied, you may need to gently express it every few hours to help it empty. Warm compresses may help with this as well. Sometimes it is a problem with the kittens not being able to find the nipple, so you could also try clipping the hair around the affected gland to make it more visible and easier for the kittens to reach. I hope this helps, and that mom feels better soon!

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