I am happy that you took her back to the vet! That is odd that it took about 2 hours for her to react though, I was always told that it usually takes 30 min for any vaccine reaction to occur, usually the vets I worked with wouldn't let our clients and dogs/cats leave until they knew they were ok! Good thing that they noted it though, so next time they will probably give her predinsone and benedryl so she doesnt get a vaccine reaction! Glad she is otay!!!!!