Hindi na yan normal, mama, usually that happens lang during the newborn phase when they're still adjusting to feeding, pero sa 7 months it could mean the milk is flowing too fast or may small issue sa feeding position niya. A few of us noticed this with our babies, and when we adjusted how we held them during bottle feeding or checked if may tongue tie, it improved na, pero I'd really suggest checking with your pediatrician to rule out anything else just to be safe.