The vet here in TN said I could start the WNV for foals at age 3 months, which I will do. I asked his opinion on 5 or 6 ways and at what age to begin those and he replied "You will get a different answer from everyone you talk to." So, I have decided to give EEE, WEE, VEE and Tetanus (4 way) approx. 2 wks after the foal has been weaned, depending on each individual and how the handle weaning. As yearlings I will give 5 or 6 ways, depends on what is available. If I plan on showing a weaner, I may vaccinate with a 5 or 6 way (booster as well) or if possible just leave the foal on its dam's side. Lots of things to consider.