Feeding Twins: Breastfeeding, Formula, and Everything in Between
By Jennifer James, UK twin mum and author of Outnumbered From Day One, the honest guide to life with twins.
Feeding twins is one of the topics where you'll receive the most opinions and the least practical information. People have strong feelings about how babies should be fed and they will share those feelings with you, sometimes before you've asked.
This post is not about how you should feed your twins. It's about how each approach actually works in practice so you can make a decision based on reality rather than ideology.
Breastfeeding twins
Breastfeeding twins is possible. Many people do it. The supply question, which is the one most people worry about, is largely answered by the fact that milk supply works on demand: two babies feeding frequently will stimulate a supply sufficient for two babies. The body adapts.
The practical challenge is not supply, it's logistics. Tandem feeding (both babies simultaneously) requires support in the early weeks until positioning is established. A twin feeding pillow helps. It takes time to find a hold that works for your particular babies. Getting support from a breastfeeding specialist or La Leche League in the early weeks makes a significant difference.
If breastfeeding is something you want to try, try. If it doesn't work, or you decide it's not right for your situation, that's also a valid outcome. Fed babies are what matters.
Formula feeding
Formula feeding twins is straightforward in principle and logistically demanding in practice, particularly at night. Two babies feeding every two to three hours means a lot of bottle preparation.
The tools that make it manageable: a formula maker (Tommee Tippee Perfect Prep or Baby Brezza are the most used), a bottle warmer for night feeds, a mini fridge in the bedroom to store pre-made bottles, and enough bottles to get through a night without washing up. Twenty bottles sounds excessive until you're on your fourth night feed.
Batch-preparing bottles in the evening and storing them in the bedroom fridge removes most of the work at 2am. This is worth setting up before the babies arrive.
Combination feeding
Combination feeding, using both breast milk and formula, is more common among parents of twins than in the general population. This is partly practical: formula gives other caregivers the ability to feed, which gives the breastfeeding parent a break that matters enormously when you have two babies.
If combination feeding is something you're considering, the most useful thing to know is that introducing formula doesn't automatically end breastfeeding. Supply adjusts to demand, which means replacing some feeds with formula will reduce supply for those feeds. How much this matters depends on your goals.
A breastfeeding counsellor can help you navigate this in a way that supports your specific goals rather than a general position on how babies should be fed.
The night feed question
The most significant practical issue in the first weeks is night feeds. Two babies, feeding every two to three hours each, means that unless you synchronise their feeds you are essentially feeding continuously through the night.
Synchronising means feeding both at the same time. This involves either tandem breastfeeding, or having two adults each with a bottle at the same time, or one adult managing two bottles simultaneously. Setting up a night feeds system that actually works is closely linked to twin sleep in the first six months, since synchronised feeds are what produce longer stretches of sleep.
One adult managing two bottle feeds simultaneously is possible with some setup. Laid-back positions with both babies propped or a twin pillow can work. It requires practice. It's worth practising before the first night rather than during it.
Feeding gets its own dedicated chapter in Outnumbered From Day One, covering setup before birth, the first six weeks, and how feeding evolves through the first year. Written from the perspective of someone who's done it, not someone telling you what you should do.
Weaning at six months
The principles of weaning twins are the same as weaning one baby: start around six months, introduce one food at a time, watch for reactions, offer a variety of textures and flavours, and expect a significant amount of food to end up on the floor.
The practical differences are quantity (twice the prep, twice the mess), seating (two high chairs side by side from the start), and pace (both babies may be ready at slightly different times and that's fine). High chairs and weaning kit are covered in the twin baby equipment guide.
Baby-led weaning works with twins. Purees work with twins. A combination works. What doesn't work is making it more complicated than it needs to be.
FAQ
Can you breastfeed twins? Yes. Supply adapts to demand, and two babies feeding frequently will stimulate a supply sufficient for both. Tandem feeding takes practice to establish. Support from La Leche League (laleche.org.uk) or a breastfeeding counsellor in the early weeks is helpful.
What formula maker is best for twins? The Tommee Tippee Perfect Prep and Baby Brezza are the most widely used by UK twin parents. Both make formula at the right temperature quickly. Test whichever you choose before the babies arrive.
How do you manage night feeds with twins? Synchronise feeds so you're feeding both at the same time. Pre-make bottles in the evening and store in a bedroom mini fridge. A bottle warmer at the bedside removes the need for kitchen trips. One adult can manage two bottle feeds simultaneously with a twin feeding pillow or propping.
When do you start weaning twins? Around six months, in line with NHS guidance. Twins may be ready at slightly different times. Two high chairs side by side from the start. Expect mess on a scale you cannot currently imagine.