I have 17 month old twins - a boy and a girl. Leo is a fabulous eater and will chomp his way through most food, being fed and feeding himself. Georgia on the other had is more fussy and is going through a phase of refusing to feed when I offer her food. As soon as our nanny takes over she calms down and happily eats. What is going on here? When I walk in the room she often starts crying. I understand that this could be her competing for attention but the refusing to feed is upsetting me. What should I do?