When I first began working with birds in zoo collections, older keepers warned me about respiratory ailments such as “Bird Breeder’s Lung” and “Poultry Worker’s Disease”. Several of my co-workers were always short of breath and coughed frequently. Eventually, some were diagnosed with Hypersensitivity Pneumonitis (a/k/a Extrinsic Allergic Alveolitis), which results from inhaling organic dust and other irritating substances. Private bird owners are also sometimes afflicted with this condition, and birds themselves may sicken and die when exposed to certain common airborne particles and chemicals. Unfortunately, advertisements for air-cleaning devices have confused rather than clarified the options available to us; some are actually harmful (yet still on the market!) while others are highly effective. Read More »