Join Date: Apr 2008
Location: Orange County, NC
Our mare Cinnamon had a very similar looking one on her side that was a basal cell tumor. As someone else mentioned, there are a lot of types of skin tumors that horses can get and the only way to know for sure is to biopsy it and have the pathology done. In Cinnamon's case, it stayed about the size of a pencil for 6+ months but then doubled in size in January so we had the vet out to remove it and get the pathology report (basal cell tumors are not malignant, but they can grow).
On the sixth day, God created the Quarter Horse.
On the seventh day, he Painted the good ones.