My mums little black lab has a lump at the base of skull. She is around 15 years old and has been losing weight, but still has a very good appetite.
The lump doesn't move when you try and move it. This is bad isn't it? 
I am kidnapping her on Monday to take her the vets. My mum daren't take her a she is besotted with her and couldn't handle any bad news and knows she wouldn't be capable of making the best decision for the dog if the worst is recommended and my Dad is too ill to walk to the vets alone and doesn't have a car during the day.
The dog isn't in any pain and still has a fair quality of life, although she appears to have gone deaf lately. She still loves her walks and gets very excited when I go around as she knows it's walkies.