As little Sam was developing from an infant into a juvenile siamang, Smitty was becoming an adult. He became less playful and slightly more dignified. Greysolynne Fox had noticed that the siamangs did not usually play alone and that two animals played together more often than three. When Sam was very young. Smitty and Les were the more frequent play partners. Later, Les played with Sam. Greysolynne especially enjoyed watching Les and Sam foot wrestle. In this game, the two siamangs faced each other as they hung from the top bars of the cage. Then they kicked out, each trying to hit the soles of the other’s feet with his own. Sometimes they used their wonderfully agile, grasping feet to grab at an opponent’s ankle. When Les and Sam swung back and forth as they foot wrestled, it reminded Greysolynne of a ballet.
		Greysolynne began to look for signs of aggression toward Smitty. He was growing up, and Unk and Suzy could be expected to push him out of the family as they had done with Mark. But although Smitty did not spend as much time with his parents as he once had, the intense hostility that Mark had experienced did not develop. Greysolynne and the zookeepers agreed that Unk and Suzy probably would not have more babies. They were more than twenty years old and beginning to show signs of old age. If the family were to remain stable, perhaps Smitty’s continued presence would not be a threat. (Months later, this theory was proven incorrect, when Unk began displaying hostility toward Smitty. Someday, he too would have to be removed from the family group.) As for Mark, living alone was not satisfactory. A social animal who had grown up in a family group, she was obviously depressed by herself. Zoo officials began to look around for suitable companionship for her. They soon learned that officials of the Cincinnati Zoo wanted to breed siamangs. They already had one female, and in the fall of 1973, they acquired a five-year-old male named Chiffy from a primate research center. The Cincinnati Zoo would be glad to take Mark on a permanent breeding loan. This meant she would live in Cincinnati, and if she produced young, half the offspring would stay at the Cincinnati Zoo and half would be sent to Milwaukee. By sending Mark away, the Milwaukee Zoo was not only giving one animal a chance for a happier life, but also helping to insure a growing zoo population of a rare species. In January 1974, Mark arrived in Cincinnati. At first she was placed in a cage with the other female. Both animals seemed happy to have company and got along well from the start. Chiffy was placed in an adjacent cage, separated from the females by only a wire mesh. When no hostility developed, the three siamangs were placed together. It was practically a case of love at first sight. Mark and Chiffy formed a pair bond and ignored the other female completely (she was finally removed). Chiffy was still quite young, and probably not fully matured physically, so the zookeepers knew that the siamangs might not reproduce for two or three more years. But Mark and Chiffy behaved like normal gibbon mates. In both Cincinnati and Milwaukee, zoo people looked forward to a second generation of zoo-born siamangs.