It is very common for breastfed babies to start refusing bottles after 6-8 weeks of age. Try having someone other than the breastfeeding parent offer the bottle while you remain completely out of sight, as babies can sense your presence and may prefer the breast. Experimenting with different bottle brands, nipple flows, or trying to offer the feed when the baby is sleepy or in a good mood can also help. Persistence is key—continue offering the bottle consistently without force to avoid creating negative associations, and consider using a sipper cup or spoon as a temporary alternative if the bottle continues to be refused.