You might also ask your vet, or MD, for a Rx for an EpiPen http://www.epipen.com/?p=EPKW2001&s=01&c=96&eng=GGL It's an auto-inject device with Epinephrine for life-threatening allergic reactions and shock.
They are expensive and have a limited self-life however.
And while you're bugging your doc, ask for a quinolone containing antibacterial eye drop.
I also bring Bag Balm which really helps the rash/irritation the dogs get on their lower abdomen from running in wheat stubble.