kanang vaccine shots sa mga pups timing2x ra na, lucky if the 1st shot would take effect already..on what ive read the reason why vets would reccomend usually a series of 3 shots with an approx. 4 week interval each. coz the vets. doesnt know exactly when the pups motherly immunity would lapse..vaccines given to them will not take effect if the natural immunity still active...if the natural immunity still active when the first shot was given, that first shot is not in effect..after several days ma timing na mo lapse na ang immunity then the scheduled 2nd shot was administered..then thets the time the vacs. will take effect..so basically not all 3 shots are prerequisites of each other..1 out 3 is all what is needed..which one? we dont know..