Hi Kathy,
For a case like this, I usually stay away from Blood movers, and use Hoxsey and Si Miao San together.
They are fine with chemo in principle, and may enhance its efficacy. For that reason, I use them even on chemo days, although I know Erin likes to skip giving herbs on injection days. So your choice there. If you can get the situation cooled off, and there are still tumors on the periphery, I'd recommend removing them at some point.
If chemo takes the dog very low, you can use Six Gentlemen (Liu Jun Zi Tang) to pick her back up, and temporarily halt the Hoxsey and SMS. Otherwise, though, I'd use them as long as there is a suggestion of Damp Heat
Hope that helps!
Steve