Why is my senior unspayed dog's breast getting bigger? Is it serious?

Question

My dog have a big boob and it is getting bigger. I did some research and it may be that my dog is not fixed. Am I right and if not what is wrong? Pet's info: Dog | Boston Terrier | Female | unspayed | 12 years old

Emily Fukuzato, DVM · Accepted Answer

If Hooch has a mammary gland that is becoming enlarged, at her age, it may be a growth or mass. Many dogs at 12 years of age no longer have heat cycles or very few. If she is currently in heat and all mammary glands are a bit prominent, than you may be correct and that it is hormones. However, if only one of them is enlarged, it is most likely not related and should be checked out by her veterinarian when you can get an appointment. Hooch could develop an infection, inflammation, or even a mass related to cancer in her mammary gland(s) at her age. Best of luck to you and Hooch.

Why is my senior unspayed dog's breast getting bigger? Is it serious?

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