I read up online about vaccinating our little Yorkies...and I found a lot of them ended up sick or "affected" more negatively than medium or larger breeds, so I asked my vet at the time her advice. I was told that we should only give 1/2 of the dose to our Yorkies. She only uses 1/2 the vile and tosses out the rest, (so I know it is not a money saving issue to her). She also explained how every dog, regardless of size gets the full dose and she does not see it necessary to give a small breed such a large dose. She told me of two seperate times that small dogs that have come into her office almost dead from a reaction to a shot and I was content to only give my babies half he "normal" dose. I have always given them all only half and they have all been fine and healthy and had almos no reaction to their shots. I am not an expert but this is what has worked for me...
BTW-I was also told never to gove lepto unless I was in a high risk area...especially after what Ellie May had to go through~I am so sorry for that...