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This article includes a list of general references, but it lacks sufficient corresponding inline citations. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Gua was a chimpanzee raised as though she were a human child by scientists Luella and Winthrop Kellogg alongside their infant son Donald. Gua was the first chimpanzee to be used in a cross-rearing study in the US. Gua was born on November 15, 1930 in Havana, Cuba.

Donald, who was 10 months old at the time. For nine months the Kelloggs raised the two as “brother and sister”, and comprehensively recorded the development of the chimpanzee and the human child. When she was around one year old, Gua often tested ahead of Donald in such tasks as responding to simple commands or using a cup and spoon. The parting difference came with language. Donald was about 16 months and Gua was a little over a year old when they had language testing. Gua could not speak, but Donald could form words.