you have to give your baby enough liquids as soon as you start solids. here is my story. my baby girl started to eat solids pretty early. she is a very good eater and i discussed it with my ped. she was finishing a big jar of vegetables, fruits or a whole bowl rice cereals, so i strated cutting down her milk. unfortunately she doesn't like drinking (we've tried everything, water, tea, diluted juices), she refused everything. now we are in a hospital, she's got a urin tract infection, because she didn't drink enough. i don't want to scare you, just keep in mind that your baby needs a lot of liquids.
we're off solids now and before my little girl doesn't start drinking like a big one, i'll not make the same mistake again.