I booked my vet several days ago to do a number of vaccinations inc, EVA for my Shagya stallion. He told me yesterday there is a supply problem from manufacturer.
During the season there was a problem getting hold of ovuplants, but not heard about any problems with the EVA vaccines. As you're talking of your stallion, I assume you mean the Artevaq vaccine? Not Duvaxyn EHV 1,4, which I think is a Pfizer (though did Pfizer buy Fort Dodge?)