Why is my unspayed senior cat in heat so long with mammary cancer?

Question

My 15-year-old cat was never spayed. She now has mammary cancer. She has been in heat for about a month now, This has never happened - so long! Could it be related to the cancer? Otherwise, she's very sweet and affectionate vhjjhh. Pet's info: Cat | Mixed Breed | Female | unspayed | 15 years and 8 months old | 5 lbs

Laura Johnson VMD · Accepted Answer

HI, thanks for Petco Pet Education Center, formerly Petcoach! I am so sorry to hear about Layla! In cats even spaying them at 6 months of age they can still get mammary cancer. In dogs getting them spayed before too many heat cycles lowers the likelihood that they develop mammary cancer. When you say Layla is in heat, are you seeing discharge from her vulva? or is she vocal and behaviorally acting like she is in heat? If she is having discharge I would get her checked for an infected uterus. If no discharge there could be a metabolic condition, like hyperthyroidism (overactive thyroid) that can cause increased vocalization. I don't think any of the above is related to the mammary tumors. Hope this helps!

Why is my unspayed senior cat in heat so long with mammary cancer?

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