The vet came out to give Hero his vaccinations in the morning, just the same ole routine. He was completely fine in the evening. Then the next day Hero was very stiff and running a fever. Still had an appetite but had trouble bending his neck. His muscles seemed to be locking up and spazzing out. Then finally he started to get hives on his neck. Called the vet to say Hero was having a bad reaction to the vaccines. The vet came out and gave him a steroid and bute. Vet said he should bounce back pretty quickly. Hero has never had a reaction to his vaccinations but for who ever has deal with this, did your horse bounce back quickly?? Or had more problems?