Switching to whole milk

Breanna • Walker Ray 💙

My son will be 11 months on Friday and I want to slowly start the transition to whole milk. I’ve weaned him from breastfeeding during the day. The only time he nurses is before bed and when he wakes up. Throughout the day he gets formula. Should I just do 1 ounce of whole milk and the rest formula? And for how long before upping the whole milk?