Please DON"T give the baby water. Follow the instructions in the link I am providing.
http://www.pigeons.biz/forums/f25/basic-steps-to-saving-the-life-of-a-pigeon-or-dove-8822.html
http://www.pigeons.biz/forums/f25/basic-steps-to-saving-the-life-of-a-pigeon-or-dove-8822.html