I spent the majority of my working period in a research facility, and in spite of taking precautions I am allergic to rats and their urine, rabbits and guinea pigs.
Allergies to poultry dander are not at all uncommon. Pigeon allergies are generally among the worst and most serious. I always wore a canister type filter when handling birds or cleaning lofts. Sadly these allergies generally become worse with continuous exposure.