i fill the tray once a day, she eats all of the food thats in there. i just dont want her ot eat so much she will get sick. i figured she eats alot now because she is used to us, and she didnt eat much when we brought her home. and since she was in a cage at the pet store with lots of other teils she probley wants to eat it all sicne she might think someone else will get it.