I have a 17 yr old Border Collie who has a growth in the top part of her mouth and this has made her snout swell on one side. This is also bleeding every day and sometimes blood from her nose as well. I took her to vet and they said they dont know if it's cancer or not and gave me a load of tablets. They cant do an operation cos of her age. Penny has virtually stopped eating now and Ive got another appointment at vets tomorrow. Dont know weather to ask the vet to put her to sleep or not. Some advice please.