We are heading to the vets on Friday for par/distemper. Our immunizations have been altered to a slower schedule as Finn had a significant adverse reaction. Pre-medication with Benadryl before his appt. His reaction was SOB, fast heart rate , temp and fast breathing(sluggish as well). We think with narowed it down to par/distemper. Has anyone experienced this? I am in the dread feeling at this time......