Thanks all for the info. I was tempted to ask my vet, but needed an objective opinion. I'm now worried about the possible anemia reaction. Mine got the shot 4 days ago for an infection and is now totally listless (barely moving around) and not eating much, a lot like what many of you report. I sure hope this is temporary and not a sign of getting worse, especially since this one was eating fine before the shot. Very confusing when I've read that some call it a miracle drug!