My 3-month-old breastfed baby won't take a bottle. Are there some special bottles or nipples he might take?
Experiment. You may have to try different types. Also, your baby may resist taking the bottle from you. He smells your breast milk and may be confused by the plastic bottle. Have dad or a grandparent give the bottle, and you get a break for a while. If the baby is hungry, he will probably take the bottle better from them.