i wish you the best with your dog as they certainly are mans best friend . i have had two personal experiences with dogs and cancer and they made it through and lived normal lives after treatment . we are very close to Cornell university which specializes in cutting edge cancer treatments . find a good place and bring him or her there as there is so many options out there today . keep the faith and the fish tank can wait but please get him some treatment asap and i do wish you the best .