I took Zeus and Xena in for their first shots. They received Distemper and Parvo only. They had a meal about 2 hours later and went to sleep. Upon waking up, they both went potty like normal and then Xena vomited a small amount of undigested food wich she quickly put back. Less than 5 minutes later she vomited a much larger amount of undigested food. I did not allow her to eat it. She did not vomit anymore and her next stool was firm and normal. She's drinking water on her own. Aside from the vomiting her behavior is normal. I'm not sure if it's a reaction to the shot or just too much activity in one day. Both were very nervous on the car ride to the vet and then the excitement of all the animals and people in the office which they are not accustomed to either. I'm trying not to be overly worried. I decided not to give the last meal of the day and just monitor them both until tomorrow. Zeus has not had any vomiting or other reaction that I can tell. Has anyone experienced this? If it's a reaction to the shot, should she not be vaccinated further or should I just consider this a mild side effect and continue with her schedule? I had only planned to give them two rounds of shots prior to the rabies vaccine.