Everybody chime in =) Grass allergy is common in every species, but also consider that even though you can't see fleas, they could very well be on your dog anyways, and even if you are using flea preventatives, if they are rampant in areas like grass, your dog will get bit (albeit less often, and their stay will be transient). Fleas and grass always go together, if it's not one, it's the other, and usually it's both =)