Are you in close proximity to your neighbors? Things like that could of been prevented!!! Separating them in two rooms, they will eventually quit. My macaw regurgitate to my dogs and I don't see any problems what so ever. I'm kinda lost on the main reasoning why you re-homed the macaw again? They can be taught to do indoor voice, IF you can teach them tricks, indoor voice wouldn't be hard....Plus that's how macaws communicate is through their calls. I'm not trying to sound harsh, but you must read more next time before attempting to bring one home for two months then find them new homes again, it's not a easy thing for a parrot to go through! I see you have saltwater fish tanks, you learn to quarantine but I see your also asking for trouble adding certain fish to a coral reef tank. I'm a ex reefer here!!! I sold all my saltwater earlier this year to have more time for my birds....Reading and asking questions as much as you can is my advice to you!!!