It depends on the province she is in. She would complain to whoever makes the rules for daycares. In Ontario we have the Day Nurseries Act and the ministry of social services, etc. A complaint to anyone would help her get the names of who she needs to deal with. There was a daycare in our area closed down for a similar offence. Many daycares purchase their meals from a catering company that then delivers them to the daycare daily as compared to cooking on site. There is a chance the menu was changed without the directors knowledge but so what the reaction was not appropriate.