My 5 year old (she will be 6 in July) step daughter is constantly asking for something to eat!! She will eat her breakfast and 10 mins later look for more food. She is a little overweight and is wearing 8 year old size clothes. We have stopped giving her as much sweets as she used to get and is now only really allowed a treat once a day like 2 biscuits or crisps. We are getting her out for walks recently and have stopped fizzy drinks. She is constantly asking though and it is driving us mad. We have her for 5 days then her mother takes her for 5 days so we don't know what she gets to eat there. Lets just say her mother is not the best mother at all. I try to give her good dinners and grill instead of fry stuff for her. any ideas on what to do?