When to mate young alpacas We would consider mating at under two years old if ALL the below factors apply, but actually this year we have decided not to mate any of last years cria. They will be mated next year, with their first cria due in 2024. At least 60% of mums body weight. At least 50kg. At least 13 months old Keen to be mated | Mullacott Alpacas