1931, Dr. Kellogg received a grant for an experiment to raise a chimp along side a human baby. His wife had just had a baby boy, David, so they decided to raise him along side a baby chimp, Gua. Things started to go wrong when David started to become more chimp-like than Gua became human-like. He only learned a few simple words and often made chimp howls when he wanted something. After only nine months, they gave up on Gua, concerned that David would fail to grow up like a normal human child.