Posted 7/12/2015 4:18 PM (GMT -8)
Actually, I've known many CFers, myself included, who've had horses and handles hay for decades with no aspergillus issue. I've mucked stalls since I was 6 every day of my life and not only fed hay, but helped load and unload haytrucks. It's been my experience that horse hay is pretty high quality (horses wont eat moldy hay unless they are starving) and aspergillus wouldnt be much of an issue. I WOULD be concerned about round baled cow hay though. I also have bad allergies to mold and never had an issue with my horses (I had my own stable and 6 critters). If you are super concerned, wear a high quality respirator mask for grooming and stall mucking. That will cut down on the dust, which your granddaughter should NOT be breathing. I always vacuumed my horses :) Seriously..... Too clean an environment is just as bad as filthy.
Like the moderator said, PA is everywhere and you're going to pick it up if your lungs are comprimised. Best you can do is keep the lungs clear and your immune system cranking.