Transition from formula to milk

Alyssa

Hey !!! So my LO is 11 months old , going to 1 in 2 weeks . I want to start to transition him so today in his afternoon bottle I did 6 ounces of formula and 2 oz of milk it says to do that for 1-2 days but do I do it in every bottle or just one bottle ? Also he has been eating yogurt with whole milk in it with new issue or allergy so do I really need to do the transition period ?

Thank you in advance for any tips 💙