During Fritz's chiro treatment yesterday his new vet and I discussed the occurances of cancers in Rotties, Berners, Mastiffs and GR's. She plans on studying and researching these instances more in depth when she retires to see if she can't find a correlation to environment and/or genetics.
I agree that treatments for this disease are to buy you more time with the dog. We did not opt to treat Mocha's lymphoma other than managing her with prednisone. Although her time was short between the dx and us having to put her down this time was mainly for us to be able to say goodbye. But we did this with her interests at heart too...we did not let her lose her dignity.
It is an emotional decision that has to be made with the individual dog's quality of life and dignity as the sole interest.
I am so sorry you are having to go through this.
You are in my thoughts.