Feeding at night is still necessary after six months (if they are waking up for it). It’s good for them!
The detailed answer:
Despite what many “baby sleep experts” will tell you, babies after the age of six months may well still be hungry in the middle of the night. Even though from six months they will be starting solid foods alongside milk, their stomachs are still really quite small and the various cognitive leaps and growth spurts that continue to occur throughout toddlerhood mean that your baby may well be waking hungry during the night.
If you are breastfeeding, your baby or toddler will often feed more frequently in order to increase supply for a growth spurt or oncoming illness. This may seem like a nuisance at times, but it’s really good for them.
Equally, breastmilk in particular is a fantastic way for a baby to get back to sleep, as it contains lots of sleep-inducing hormones. (Breastfeeding even helps you get back to sleep too! That’s why when people stop breastfeeding they sometimes find it takes longer to fall back asleep, or why the non breastfeeding parent might take night waking a bit harder.)
Ideally, you would wait until your toddler stopped waking in the night and asking for milk before you stopped providing it. But if you feel you need to night wean (although this may not actually give you any more sleep) it is not generally recommended to try it under 12 months of age. This is because of the number of growth spurts babies go through, and the fact that their stomachs are still quite small.
Read more here:
Dr Jay Gordon’s Night Weaning Method [For babies over one year or older].