Had a long talk with my friend who is also my retired vet. He's been a vet for 40 years so he's seen a lot. He took a look at Brooke, her gums are still pale which is a concern, but he said at her age her bone marrow will be slower to reproduce the lost red blood cells. She is acting completely normally, just a bit low energy which is to expected if you are anemic. She will continue on the Yunnan Baiyo meds forever.
He said the maximum survival rate after a rupture is 4 months. Of course it can be sooner. But even if they catch this cancer before it ruptures, and remove it, survival rate is still only months. I can't envision putting any dog through a major surgery where the poor dog would be recovering for a good part of the time they have left. The only good thing is this cancer is not painful - unlike most cancers.
So we will just continue spoiling and loving on her, and when the crisis comes, we can hopefully manage to have her pass away at home without the trauma of going to the vet hospital. Just SO HARD to imagine life without my girl though.