yes, I was told that is very common for little dogs to react to the rabies, My harry had a bad reaction to the 3 year vaccine, so now he get the rabies annually and gets an anti allergy shot before. and he still sleeps a LOT and he requires a little pup aspirin the first day..
I hate when he has to get it but by law he has to have it every year..
best of luck with your pup and glad that he is ok..
hugs,