I used this stuff for cleaning up wallpaper and plaster walls that were needing a freshen up. It comes in a spray. I used it on some macaw poop - it broke up and dissolved even the hardened ones very quickly, and using a stiff brush, it could be dispersed then mopped up. It is easily the fastest working cleaner I have used. However there is not much information about whether it is safe to use around birds. I have seen both positive and negative comments. I would imagine if the residue is mopped up and rinsed thoroughly, then there shouldn't be any of it around to cause harm, but I wondered what opinions are here?