Dr. W. Jean Dodds says, "Never vaccinate a pregnant dog."
In an August 1, 2008 article in DVM360 entitled Vaccination: An Overview, http://veterinarycalendar.dvm360.com....jsp?id=568351 Dr. Melissa Kennedy states regarding modified live virus vaccines and pregnant dogs: Because the agents are infectious, there is some risk for immunosuppressed animals, and significant risk for the fetus in pregnant animals.
On Page 28 of the attached 2003 American Animal Hospital Association's Canine Vaccine Guidelines http://www.leerburg.com/special_report.htm -- it states under "Important Do's and Don'ts" 5. Do Not Vaccinate Pregnant Dogs The dog may abort of fetuses may get infect.
On Page 24 of the 2006 American Animal Hospital Association's Canine Vaccine Guidelines The downloadable in PDF format at http://www.aahanet.org/PublicDocumen...s06Revised.pdf its states that: "As with pregnant dogs, veterinary medicine has advised against vaccination during illness, due to concerns about suboptimal seroconversion, or worse, conversion of vaccine to disease." In other words, if you vaccinate a pregnant or sick dog, not only do you run the risk of a less-than-desirable immunological response, but you also run the risk of your dog contracting the disease the vaccine is supposed to prevent.
July 1, 2003 DVM Newsletter article entitled, What Do We Tell Our Clients?, Developing thorough plan to educate staff on changing vaccine protocols essential for maintaining solid relationships with clients and ensuring quality care http://www.dvmnewsmagazine.com/dvm/a...l.jsp?id=61696
Rabies Prevention -- United States, 1991 Recommendations of the Immunization Practices Advisory Committee (ACIP), Center for Disease Control's Morbidity and Mortality Weekly March 22, 1991 / 40(RR03);1-19 http://www.cdc.gov/mmwr/preview/mmwrhtml/00041987.htm"A fully vaccinated dog or cat is unlikely to become infected with rabies, although rare cases have been reported (48). In a nationwide study of rabies among dogs and cats in 1988, only one dog and two cats that were vaccinated contracted rabies (49). All three of these animals had received only single doses of vaccine; no documented vaccine failures occurred among dogs or cats that had received two vaccinations. "