BOOSTER shots #1, #2 and #3

Hey just curious.

Whats the difference between booster shot #1, #2 and #3 ? I know that all three have similar vaccinations (parvo, distemper ect) but do the amounts change? I know that the 3rd has rabies too. But my dog has had two #1 shots and one #2 booster shot and going in for her 3rd booster on monday.

So wouldn't that mean she's had 3 boosters but just needs her rabies.?

I'm only aware that it's the same vaccines given 3 times at 4 week intervals. The Rabies vaccine is not recommended to be given at the same time as the other vaccines (should be given 3-4 weeks apart). The only booster needed is at one year.

http://www.weim.net/emberweims/Vaccine.html