I am starting to worry about my LO who hates bottles. DH and MIL have tried Mam, Dr. Brown's and Tommee Tippee but she won't drink anything. They tried heating the milk, different positions, different rooms...she just clamps her mouth shut.

She is a very fast nurser and she eats on one side for 3-5 minutes every 2-3 hours. Maybe the level one flow nipples are too slow?

Do you have any tips?