This is a growth on my labrador's left hind leg. It grew about an inch and half and then stopped for over a year. It didn't seem to bother her. I assumed it was just a fatty tumor. For a few months now, it has been changing, growing extra little bumps on the lower edges. She licks it frequently. Does anyone know how serious this might be? Ethel is about 9 years old. I cannot afford a large vet bill. We have had to do an extensive mold remediation in our crawl space and in our house. We are in $50,000 worth of debt because of this remediation and we're not done yet. Ethel runs around our property like normal. I have thought about calling into the vet to make an appointment to show pictures through the door window so there is a barrier. Advice welcome.