Has anyone ever noticed whether or not their horses get a bit lethargic after spring shots. I usually give my autumn shots myself but in the spring I have the vet because they have to come and draw coggins anyway. So in spring, they get east, west, venez encephalitis, west nile, flu/rhino tetanus. Maybe more. Anyway I notice that they get lethargic for a few days after the mother load of vaccinations. I usually give a strangles vac a few days later( the intranasal). Now my vet said to give the strangles orally. Apparently giving it orally it only takes 2 hours to reach the lymph nodes and giving it intranasally can take up to 12 hours. What do you vaccinate for? And how often? Now my mares are not bred and won't be. I usually vaccinate twice a year and if there is an injury they'll get a tetanus.