Other humans, who are uneducated about birds, who enter your home, may be intentionally or unintentionally hazardous to your birds. In particular, be sure to educate each and every member of the household staff about what things are dangerous to parrots (which may not be inherently apparent, eg, avocado, Teflon, oven cleaners, pesticides, etc). Also, make sure you give very clear and firm directions about who is allowed to do what in the bird room. One new housekeeper I had, I noticed her trying to pick up dropped food pieces from Chilli's cage, off the bottom tray (hmm yes, amongst all that lovely poop) poking her fingers THROUGH the cage bars AND the bottom grate to try and reach the food because she could not abide any waste! I think she was going to put the soiled food BACK into Chilli's food bowl!