Phaedra is due for her third and final distemper (FVRCP) vaccine, and I have gotten the other 2 in her scruff, and after I read about how they can get vaccine related sarcomas & how it's pretty much impossible to get rid of in the shoulder blades, I am extremely terrified and I feel so horrible for letting them give it to her in that spot.. should I get her last one in the leg?