Head movement

Sandy • Sandy Thompson

My LO is 10 weeks old. I exclusively pump. She drinks from the Comotomo bottles, slow flow since birth. Recently as she is drinking she keeps moving head left or right. If I follow the bottle with her head she drinks but most or the time I don't move with her so she looses the latch. She will get mad and take the the bottle back.....and repeat....no idea why....any takers??