I was surprised to learn that even dogs suffer from these kind of allergies just like humans do. Some breeds can be more prone to specific allergies than others, but yeah poor puppies suffer too during spring time.
#1 Airborne pollens- it can be caused from the trees, grass, flowers, weeds etc. What does, is that causes allergy symptoms such as itchiness or even inflamed skin. The most affected areas are the skin, paws and ears.