My lovely 15 year old had a mammary tumour removed two years ago, and bounced back.
she now has a new growth, fast growing, a large tumour and smaller ones all along both glands.
the vet suggested not operating, which I really agree with.
I asked how long, he said anything from a few months to a couple of years before it spreads to an important organ.
she’s otherwise fine for an old lady- still likes a good walk, sleeps a lot, appetite not quite what it was.
i know no one can say for her, but does anyone have any experience of this? How long ?