What's Weaning? Weaning is the process of introducing solid foods alongside breast milk or a baby’s usual infant formula. Complementary feeding is the term often preferred by practitioners, but most people use the word weaning instead. Where Can I Find Reliable Information? The Best Start in Life (BSiL) website is a Dept. of Health & Social Care tool to help support your family on your complementary feeding journey. The Introducing Solid Foods section is full of helpful guida