[ratbusters]

Wow, Stella is doing amazingly well for 2 1/2 years old.
On the rat guide, there is a helpful section about mammary tumours.
One thing they pointed out, which I found helpful, is that tumours can use up a huge amount of calories to maintain and grow, so you could check Stella to see whether the rest of her is becoming emaciated.
Here is the link for the Rat Guide. There are heaps of case studies which I found helpful.

Mammary Tumor – Rat Guide

ratguide.com

 

[ratbusters]

Case study fig. 3 on that Rat Guide page really made me think, when our girl had a large mammary tumour. (Bit of a sad read though).
It mentions that ".... almost all of the nutrients she consumed were being used by her body to sustain the fast growing mammary tumor..." which was making her very thin.
I'm definitely not saying that Stella has become like the rat in the case study, but I found the article helpful in terms of preventing things from getting that bad.
All the best with her. Its always a tough call to make.

 

[ratbusters]

Unfortunately Stella's lump got so big that the skin was starting to tear. We were able to get into the vet quickly, and they do sleeping gas before the injection so it's peaceful. She was very calm and cuddly at the office before the vet got to us. It's really sad, but at least I don't have to watch her and worry anymore.
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Sorry for your loss, but pleased for you both that she had a peaceful end.