Breastfeeding to Bottle Feeding

For breastfeeding moms out there, may chance pa kayang mag-switch si baby into bottle feeding from breastfeeding? Si lo ko kasi gusto ko nang i-mixed feeding kaso kapag naman tinatry ok siyang padedein sa bote, ayaw niya. Turning 4 mos na siya this July 2 and full time breastfeeding talaga kami since day one. Any suggestions naman dyan mga mumsh. Thanks!