What are core vaccines for dogs, and how should vaccination schedules be adjusted for seniors?

• A. Core vaccines include DA2PP and Rabies; seniors should be vaccinated according to risk and guidelines, avoiding unnecessary annual boosters; consider titer testing if appropriate.
• B. Core vaccines include DA2PP only; Rabies is optional
• C. Vaccinate seniors yearly regardless
• D. Core vaccines are not recommended in seniors

Answer: (A)

Core vaccines protect against diseases that are widespread and highly dangerous in dogs, so they’re given to most dogs. The two cornerstone vaccines are DA2PP (distemper, adenovirus/hepatitis, parvovirus) and Rabies. In senior dogs, the approach shifts to a risk-guided plan rather than automatic yearly boosters. After the initial puppy/juvenile series, many dogs can space core vaccine doses to longer intervals in line with guidelines, and Rabies vaccination is typically governed by local laws and vaccine type, not by age alone. Titer testing can be considered to gauge immunity in some cases rather than automatically re-vaccinating, especially if there are concerns about vaccine reactions or if the dog has had a strong response previously. The other statements don’t fit because Rabies is not optional and annual vaccination is not routinely recommended for healthy seniors, and vaccines are not universally avoided in older dogs.