Whether this represents a transitional situation, an alternate reproductive strategy based on cooperative rearing of infants, or just variation in tolerance between adults is unknown. In captivity aggression occurs between animals of the same sex, especially between adult females. Mothers have been know to attack their older daughters, resulting in the death of one or more animals if they are not separated. Males appear to be more tolerant of each other, but will fight on occasion. Births are usually twins.
Infant care is cooperative.
All members of the group will carry an infant, with the adult male commonly doing the largest share. The mother only takes the babies to nurse them. Young animals benefit from their experience with younger siblings. Males and females with previous care-giving experience as youngsters are much more likely to successfully raise their infants from the start. Pairs without prior infant experience often lose several sets of infants before they become competent parents.