Ah, springtime! The flowers are in bloom, the leaves in the trees are budding, and all of nature seems lush and fresh! For many, it’s their favorite time of the year. For others, it’s simply horrible. Seasonal allergy suffers are subjected to pollen from grass, weeds, flowers and trees. It’s inescapable. And it’s miserable.

Humans can, however, curb their contact with allergens in obvious ways like staying indoors. They can also take daily medication to help combat the annual symptoms. Easy enough. But what about dogs? While not as prevalent with dogs as with humans, they...