Hi,
DC1 is 3 months old today and is FF. We are using Philips Avent bottles. She's still on the size 2 teats, but I am wondering when I should switch her to size 3, which it says is suitable for babies of 3 months+. How do you know when to switch up? And, conversely, if you give your DC the next size up, how do you know if they are not ready? Any signs of readiness or it being too soon might be a bit complicated in DC1's case, because we are still getting to grips with a severe cow's milk allergy so we still have quite a bit of regurgitation to deal with and sometimes some distress at feeding time.
Really greatful for any advice! Thank you!!