My daughter & son in law just got 2 new puppies - brother & sister. They are 8 weeks old now. After getting their first round of vaccinations about 2 1/2 weeks ago, the girl got sick and threw up immediately after getting it. Vet gave her Benadryl. Does anyone thing this was an allergic reaction or maybe she was just worked up & excited? We would like to give the next round at home, but I am afraid that if this was an allergic reaction she may do it again, or worse. Any ideas? Thanks