Today when I was petting Puffy, I found a pea-sized lump on his back thigh. It doesn't seem to bother him, but it's definitely there. I'm going to get him to the vet for a check up, but I wanted to see if anyone has ideas before I go (won't be able to until next Thursday - pay day). The lump doesn't move with the skin, but seems to be attached to the muscle. It's hard too. It's located on his back thigh, fairly close to the edge of the muscle, near to his hiney. I read about vaccine induced tumors (he was vaccinted a few weeks back), but I don't know if that's where they vaccinated him (seems a wierd location for a vaccine). Puffy is very young (only 6 months old) so I was suprised to find this on him? Any ideas other than waiting to see what the vet says? I'm a worrier, and this is going to drive me crazy!