The American Association of Equine Practitioners recommendations for vaccination of healthy horses:
http://www.aaep.org/info/guidelines-48
Equine Herpes Virus information for horse owners:
https://www.aphis.usda.gov/vs/nahss/equine/ehv/equine_herpesvirus_brochure_2009.pdf
AAEP equine dentistry information:
http://www.aaep.org/info/horse-health?publication=733
University of Minnesota Equine Center
http://www.cvm.umn.edu/umec/home.html