[LoveMyBaby]

Originally Posted by yorkieusa

And I found this, but so far nothing that says anymore than has already been discussed:

Logically, you would wonder: "Why give the same dose of a vaccine to a 90 pound dog that you would to a 3 pound dog?" Even within the breeding community, there is dissension about which vaccines to give. One breeder has quit giving the Leptospirosis Vaccine to their puppies based upon research at Kansas State University that suggests that there are more reactions to this vaccine than to others, and that Leptospirosis is pretty rare. Another breeder has not had any problems with this particular vaccine, although it is not given to their pups until 4 months of age. In the final analysis, the decision when and how much to vaccinate is left to the owner's and their veterinarian's discretion.
http://teacupandtoypet.com/health/chihuahuahealth.html

you're the best *HUG* for doing all this research