Researchers said that she tried to nurse All Ball and was very gentle and loving .
Penny Patterson , who had custody of Koko and who had organized The Gorilla Foundation , wrote that Koko cared for the kitten as if it were a baby gorilla .
Researchers said that Penny Patterson tried to nurse All Ball and was very gentle and loving .
Penny Patterson , who had custody of Koko and who had organized The Gorilla Foundation , wrote that Koko cared for the kitten as if it were a baby gorilla .