Need funds for vet bills.

This is my dog Nanook. (white one) He has been in my life for 5 years. I suffer from a lot of physical pain, anxiety and depression. All on his own he has picked up on these cues and has helped me very much over the years of having him. I was able to get him a service dog license. Not only has he helped me but he has helped people in the community going through a hard time, he would take me up to them and allow them to pet him leaving their day just a little better.
I'm am sadden to announce that he has grown a mass behind his ear that needs to be removed. This mass may or may not be cancerous, I won't know until he has it removed.
I am on ODSP, and they fail to recognize him as a service dog even with a Doctors letter. I am unable to afford this surgery. This surgery needs to be done ASAP so that the mass doesn't get any bigger.
I am reaching out for donation help to get my dog the surgery he needs to keep working for me. I need the money for the surgery, for the mass to be sent out to get tested, and for transportation costs, as I do not have a vehicle.
Thank you for taking the time to read this and if you could please share as well. I am forever grateful for any help that comes for this.
Bless you all for your kind hearts!