!5 year old daughter and food!?

My daighter is a commited 6 to 5 day a week premire soccer player, she has a very muscular strong sturdy built body, she is about 5'1 in hight maybe cm shorter but every month or so for a couple of days she just eats and eat and never gets full nor sick but after that week or fue days shes back tt normal and eisly can control herself. Is this sighs that she is growing i dont want her to gain weight. does muscel burn fat throught the day? many say she is growing is that true shes short and im 5'4 5'5