Dottie, with the swollen glands, along with the growth they have found in her rectum, did the vet say anything about this possibly being lymphoma? They can't tell for sure without a needle biopsy, but with swollen peripheral nodes that is easy enough to do. I did a quick review of your thread, & I don't see where you posted how old Tess is? If they think this may be lymphoma, I can probably help you with information about that.
Debbie