Adding in milk to baby’s diet?

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So my daughter just turned 1 a few days ago. I plan to breastfeed till she’s 2. Her pediatrician said that we need to start adding milk to her feedings. She breastfeeds 5-7 times a day. Would I just breastfeed then give her some milk or would I pump and give her the milk with breast milk 5-7 times? I’m not sure how to go about this so anything helps lol