13-year old Sheltie female vomiting constantly
We have a 13-year-old female Sheltie. She is in generally great health. She hasn't eaten "dog" food in many years, and when we started her on her "real" food diet (raw meat with bone, cottage cheese, eggs, cheese, vegetables & fruit - which are limited as per the recommendations of a number of organically-minded breeders), her gray hairs disappeared and she looks like she did when we adopted her at 7-years-old. She has always been a VERY shy dog, so we only see "spunk" in her first thing every morning, which only began a couple of months after we adopted her. It has become a habit for her to jump up and put her front paws on our bed and to bark and let us know how happy she is to see us first thing in the morning. It's been wonderful to see her come out of her shell somewhat since she became a part of our family.
A couple of years ago, we found a lump on one of her teats, so we took her to the vet. They took it out and found that it was cancerous. That's when we changed her diet to "real" food. For the past two months, she has been throwing up her food - all of it, all over the house, when we least expect it. After inspection, we found another lump in her front right "arm" pit, if you know what I mean. This lump is huge, and we're wondering if this might be a sign that she's on her way out of this life and into the next.
I am a retired, disabled veteran on a fixed income. We can't afford to take Annie to the vet, so we are looking for anyone out there who might be able to point us in the right direction. What might be wrong with Annie, and what might we be able to do for her?