Yes - Bo had a lump on his rear flank, probably from the rabies vaccine. But it showed up MONTHS after his last shots. When I found it, it was pea-sized. I called the vet right away, and by the time he was scheduled for surgery it had grown to walnut-sized.

It was biopsied and tested, and it was cancer. They got it all and he's been fine since. I panicked badly during that time. I check him daily for any lumps, and so far, so good.

This really makes me think about what vaccines are really necessary for indoor cats. I still get so confused about the whole deal I want to cry. To think that something I did to him (shots) could have killed him makes me feel so guilty.