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My spayed kitten has enlarged, soft breasts, but no lumps. Why?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 9 months and 17 days old | 9 lbs

Hi! My friend’s kitten who’s almost one and fixed, we noticed that she has enlarged breasts, no redness or tender to touch, they are really soft and no lumps at all, what can this be?

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on April 18th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! It is likely mammary gland hyperplasia which is benign growth of the breast tissue in cats. It can happen after the cat is spayed if they ovulated and were recently in heat before the surgery. It is secondary to hormonal influence. It should resolve on it's own. I hope this helps!

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