I guess my dog is a terror based on what you guys write.
Misha, my current Akita will tear apart rabbits, opossums and raccoons at every chance, and has done so on several occasions. She also bloodied up my sister in laws dogs a couple times. She is friendly to people IF they are let into my home, but is defensive of the home against all other strangers, both 2 and 4 legged.
Ed & Steve, my past 2 Akitas were very much the same. IF you were let into the house you were treated like family, but anything that is not supposed to be on THEIR property or in THEIR house, well that is just a target of opportunity.
After a couple years I wised up and have the 'dog yard' fenced in (120 by 60 feet) with the trees from the woods trimmed back far enough that critters in the woods can't drop over the top of the fence into the dog yard. I once saw Steve pull a raccoon out of an overhanging branch and kill it before I could get out the door to stop it. People often say that a raccoon can tear up a large dog, my experiences with 3 Akitas is that that is simply untrue, at least for this breed. They can kill and gut an adult raccoon in pretty short order.
Not sure how they would handle a cockatoo? Maybe there is something intimidating about the Don King hairdoo on those birds