Our 3-yr. old girl, Zoe (also from MF), has a similar bump on her neck. Our vet was not clear about its origins, but suggested that we have it biopsied. We have an appointment to do so next week--I'll post the results from the lab when I receive them. Jennifer Skeem, MS Department of Psychology University of Utah SLC, UT 84112 (801) 486-4518 [Posted in FML issue 1838]