Mix whole cows' milk with part breast milk or formula, and gradually increase the amount of cows' milk. Children under 2 years of age should not drink reduced-fat or fat-free milk. Fat is needed for proper growth and development of the brain and nervous system. Mar 12, 2013 · If you would like more information about breastfeeding or weaning, please check out KellyMom or La Leche League. I wrote this article because many moms ask me about weaning, in particular how to gently wean their breastfeeding toddler or preschooler. 7 Tips to Gently Wean Your Breastfeeding Toddler . 1. Breastmilk or formula are still your baby’s main source of nutrition, but you might find they drop a milk feed once they’re putting away three small meals a day. They’ll still need to have at least 500-600ml (20oz) of breastmilk or formula each day. What other drinks should I give my seven-month-old?