I'm so glad to hear that Sydney is doing so well these days! What kind of effects could there be from the Doxo chemo? I wonder what your vet's thoughts are on how she might do without this last treatment? Since she is doing so well and her bloodwork is great. But maybe this last session is an important step in the whole process. I don't know much about chemotherapy.
Prayers that she continues to feel wonderful! Please post updates when you have time.