If you compete, and any of those competitions are USEF licensed, then you need to stay up to date on the vaccine/vaccination rules. Also, be sure to find out the rules/regulations for your show’s manager and the facility you are showing at. Sometimes these can vary and be more strict, or also require things such as a veterinary health check prior to arrival at the grounds. We put a lot of money into each competition so we don’t want to get turned away at the gate for any reason!
USEF requires that for ANY competition, there is a record of a horse receiving the Equine Influenza Virus and Equine Herpes Virus (Rhinopneumonitis) vaccinations within six months prior to entering the stables of the show grounds.
If you plan on competing throughout the entire year, and even compete at a Championship show, try to schedule your vaccines around that. You do not want your horse to get vaccines the week before any important show in case of adverse reactions or stiffness. In Colorado, our show season tends to be a little shorter than in other areas, so sometimes your spring shots (if timed correctly) can get you through the end of your show season. And then you can worry about fall shots after show season has ended.
Be sure to check YOUR show schedule and find the vaccination schedule that will suit your needs the best. And with any questions, always consult your veterinarian! Remember, they are the experts.
All USEF Rules and Regulations can be found here: https://www.usef.org/compete/resources-forms/rules-regulations
USEF Equine Vaccination Rule GR845: https://www.usef.org/forms-pubs/ANcxoLX1gNs/equine-vaccination-rule-gr845
USEF Equine Vaccination Record Form: https://www.usef.org/forms-pubs/xUbu-pT8eLM/equine-vaccination-record