How often would they need a da2ppv shot?
Vaccination frequency is a very personal choice. If your dogs have been vaccinated regularly and they are 8 yr and 9 yr I would not be in a rush to vaccinate them. My personal opinion is that most pets are over-vaccinated but there are many people who would dispute that. Dr Jean Dodds is a widely respected veterinarian in the US, and her vaccination protocol is followed by many veterinary clinics. Here is a URL with her protocol --
http://www.weim.net/emberweims/Vaccine.h...
My advice to you would be to do some research on vaccinations and form your own opinion on what you feel is best for your pets. Note that rabies is normally legislated and you will have to have that done, but the other vaccines like DA2PPV and leptospirosis should be researched by you and discussed with a trusted veterinarian.
http://www.weim.net/emberweims/Vaccine.h...
My advice to you would be to do some research on vaccinations and form your own opinion on what you feel is best for your pets. Note that rabies is normally legislated and you will have to have that done, but the other vaccines like DA2PPV and leptospirosis should be researched by you and discussed with a trusted veterinarian.
Go to the vet and you can get a accurate and much need answer.