I saw my HV yesterday (who is generally crap and knows FA about bfing anyway, so I don't know why I'm even worrying...) and she said that I shouldn't be bfing my 11mo during the day cos it'll interfere with his eating solids. DS is fine with solids - not a huge eater but he's only a little baby for his age and not eating a huge range of things (but she didn't know that cos I didn't tell her).
So when did your LO stop having milk in middle of day - bf or ff/cows milk?