This often leads to weaning conflict with infants who attempt to continue breastfeeding. Details of infant feeding, weaning, toilet training etc. Early weaning from breastmilk can also increase the risk of vitamin A deficiency. There are two main approaches to weaning foals, abrupt and gradual weaning. Most mammals normally cease to produce lactase and become lactose intolerant after weaning. Many die shortly after birth or at weaning age. Mother anteaters carry their offspring on their backs until weaning them. Bawling is most common for cows after weaning of a calf. A female mates again immediately following the weaning of her pup. Lemurs are also dentally precocious at birth, and have their full permanent dentition at weaning. The nursing intervals become irregular towards weaning, which occurs at 2.5 to 3 months. Together they mean "weaning away from ", or simply ingestion. Weaning occurs after six or seven months. Their eyes open after 25 days, with weaning occurring after five weeks.