Pulmonary Hypersensitivity Syndrome affects mainly macaws, but CAN affect all neotropical species (ie, Central and South American species). For example, sun conures have been reported as being affected by this condition. Parrots known to produce lots of feather dust include African greys, cockatoos, lovebirds and cockatiels. This is not a common condition. Many people keep neotropical species with dust-producing species WITHOUT problems, BUT, if your parrot is one of the unfortunate ones which develops this condition, it will be VERY debilitating for him/her. If you DO keep neotropical species together with dust-producing species, then make sure you implement preventative measures. Preventative measures include housing the parrots far apart in separate rooms, preferably in opposite ends of the house, making sure there is lots of ventilation (ie, open windows and fresh air), using HEPA air filters (do NOT use the ionizing air filter option), and living in a warm and humid climate.