It might be Lepto vaccine, and usually it's a part of puppy booster shots. My pup had a very bad allergic reaction to it, he got very sick, had to go to ER for 24 hours, but that was only vaccine that he reacted bad to... Even Rabies shot that I heard knocks the pups out for a day didn't bother him at all - he was ready to play whole day long as always. I guess it's just an individual reaction a pup might or might not have... |