My dog is 10 years old and has a lump on its back leg. I was advised to leave as she is old. The lump is huge. The vet said that there is a 90% chance the operation will not succeed as she may not be able to stop the bleeding. This is a catch 22. If I decide to operate she might die and if not she will die anyways. I am not sure what caused the lipoma. Are there any suggestions please ie diets, food, alternative medicine etc. to maybe make it smaller. I feel so terribly sad as I should have known better.