The variation in development makes it difﬁcult to specify growth rates and adult size of animals. The pig Perky had her ﬁrst litter at about two years28 when sub-adult and was an adult ‘large’ (onda) sow at four years, but she continued to grow until six years old when everyone agreed that she had reached her ﬁnal size, weighing in at an estimated 80 kg (this rate of development compares with that reported by Malynicz [1976: table III] for Eastern Highlands herds). Pigs range in size and weight from small piglets, which at two months measure some 45 centimetres from tip of snout to base of tail and weigh in at about 3 to 4 kg, to large males, which measure some 1.4 metres long and can weigh up to 130 kg.29 According to Malynicz (1970: 201), one-year-old pigs average 22.7 kg and grow at 1.8 kg per month, a ﬁnding that Hide’s (1981: 473) data conﬁrm, Sinasina pigs putting on 1.6 kg per month average in their ﬁrst year, although their growth rates vary considerably from 0.9 to 2.2 kgs per month. These growth rates are considerably less than those achieved by exotic breeds under commercial conditions,30 which may have a selective advantage, for as Malynicz (1973a: 17) comments ‘It is interesting to speculate that the low growth potential of native pigs is a ﬁtness characteristic which may increase their survival rate under conditions of nutritional stress’. The natural life-span of a pig people say is twelve to sixteen years, although few live this long, except for highly prized, very large animals that couples may be reluctant to slaughter.