BTW I start shots at 8 weeks (providing all the weights are good) and repeat at 11 weeks and final shot at 14-15 weeks.   
Never wait longer than 4 weeks between shots and not before 3 weeks.   
If you have a real tiny pup only give 1/2 shots (you still only do three in the same progression as mentioned above) or you can delay shots.  I delayed Babies shots until he was 12 weeks old and had the vet do the first 1/2 shot I also left him there for the vet to observe for a few hours, making sure there was no reaction.     
				__________________  Kimberly      |