no it wont hurt anything giving it sooner, I would avoid giving the vaccination the first couple months of pregnancy, but if you aren't positiveon a due date and give it 6 weeks before they kid instead of 3 or 4 weeks before they kid, There wont be any problems.
Were your does up to date on their vaccinations? Have they been vaccinated yearly up to this point?
We vaccinate our kids at 4 weeks, 8 weeks and 6 months the first year. If you vaccinate your kids at only 2 or 3 weeks of age, it wont be as affective as vaccinating when they are a little older. Maternal antibodies that are in the kids system will interfer with the affectiveness of the vaccine. It is why we give a 3rd shot at 6 months of age. Then we vaccinated at a year of age and yearly after that.
Normally, our does receive their yearly vaccination, 30 days before kidding.
should be 2 cc regardless of age or size, and you will want to read the label on the bottle for exact directions, some brands vary a little, some will say give sub-Q(under the skin) only, while others say you can give sub-Q or IM(in the muscle). WE give ours sub-Q in the armpit area of the front leg, the losse skin between the front leg and chest area.