And finally tonight, come spend some time with our favorite modern american family. We told you about the tiny gorilla whose mother rejected her and the humans who took over. Tonight abc's matt gutman... See More
And finally tonight, come spend some time with our favorite modern american family. We told you about the tiny gorilla whose mother rejected her and the humans who took over. Tonight abc's matt gutman becomes a fully furry surrogate mom. Reporter: In the zoological world, this is cause for celebration. She just peed on me. Because when gladys' gorilla mother rejected her last month, there was a chance she wouldn't make it. We're going to o change into some scrubs matt. Black scrubs for that matter cause it simulates a gorilla's skin color. Reporter: In stepped less haury apes. Ron evans and his team of ten surrogate gorilla moms, who would nurse, cradle, teach, and mother this gorilla for three months before sending her to a real gorilla mom. Inside gladys' room evans' teaches me how to be a surrogate. Is the only way gladys's new gorilla family wil accept her is if humans can teach her to become a gorilla. And you don't coo to baby gorillas no talk to them like this. I always use a gorilla accent when I talk to gladys so the first time I see her I talk to her like -- gladys! Reporter: All the surrogates wear faux fur. That looks more like a sheep's suit. Are we training lambs here? Reporter: Careful not to baby this baby. You're yanking the hair. I'm yanking the hair. I'm putting my finger nails in her head and even when she's awake she doesn't mind because they're tough. Reporter: All of this, the stretching. Reporter: The grabbing, the piggy back rides mimics the activity of real gorillas. The goal is to match gladys who was born at a texas zoo with a gorilla mother here in cincinnati. But, there's a chance this elaborate experiment might not work. The day she goes in with a gor mom is the day I'm going to be happiest. There won't be a dry eye in the place. Reporter: And as every parent learns, sometimes success means letting go. Matt gutman, abc news, cincinnati.
This transcript has been automatically generated and may not be 100% accurate.