I wish I could see what it looks like..Haley(shes almost 5) had one on the back of her neck, I had numerous people tell me it was just a cyst, I finally took her to the vets and it was a tumor...I scheduled her surgery for the following Monday(took her on Friday) and thankfully it was bening..If you're concerned with it, please take her to the vet...without seeing it, no one on here could really pinpoint what it is |