Hi Christina - I'm so sorry you're dealing with all of this with your sweet Rocco. I am very familiar with the University of Guelph Cancer Center, my muppet Bruce began treatment there for osteo beginning at the end August of 2016. I can only say very, very positive things about the care he received while a patient there, everyone from the receptionist to the support team and the doctors are incredible and very informative and caring. Bruce is now just over 13 months post amputation (left rear leg) and doing great, I have been fairly quiet here lately, but when I saw that you were going to Guelph I just wanted to chime in and let you know what a good experience we had there. In fact we were just back this past Monday (Oct 2), for our puppy Bandit - she will be 2 this month, not the cancer center, but the neurology department and again the staff went out of their way for us, unfortunately her outcome is unlikely to be as positive as Bruce's has been so far.
I'm happy to hear you're going ahead with the amputation and ending the awful pain that Rocco is currently experiencing, in a few weeks time, once he's recovered from surgery you will start to see him becoming himself again.
Best wishes to you and Rocco
Tracy & Bruce