humans. at least they didn't have to wear a bunny costume like anderson cooper did. >> i brought you presents. >> reporter: the bunny happens to be their favorite characters. they cling to the moms. the humans also had to speak gorilla with disciplinary coughs and soothing belches. >> when they are content this make this noise. >> reporter: when gladys was sassy or snippy, she got a warning. they exposed gladys, to clanging doors, the outdoor habitat. even a fake fur vested reporter. >> she just peed on me. >> reporter: they showered her with affection. they introduced her to the mesh