Quote Originally Posted by dragondawg
There are no studies out that links lepto vaccinations to a vaccine side effect. Most likely because they are usually given at the same time as other vaccines, and the Lepto vaccine can not be parsed out as the cause.

We use the 4 way lepto (Fort Dodge I think) In our area Lepto is still around and last year we lost several puppies to lepto and had several others that got very sick but did recover. We have not had much for reactions with lepto. Most of the vaccine reactions we get have been from the Corona vaccine and we have started slowly decreasing how often we use that one.