Jim, we've had three of the eight dogs swell up and vomit in response to a rabies shot and a black lab years ago that did the same thing. So in dogs, at least, reactions are not that uncommon. It helps if you do the rabies separately instead of with the distemper--we always wait at least a week between the two, even though it means another 100 mile round trip to get the second vaccination. Here we only by law have to vaccinate for rabies every three years. We're seriously considering letting it lapse, though, in the dogs that are older than 10. We won't do the distemper shots after that age, either.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."