Isabelle keeps helping herself to food out of our fridge when my back is turned... Cheese strings, yogurts, cake slices etc. She has been known to get a whole hunk of cheese and nibble at it. Someone suggested putting a lock on it but not sure I want to go down that route as I'd prefer her to know she can eat when she's hungry. The issue is that I'm not sure when she's hungry or just bored and also sometimes she does it before I have a meal planned. She has a fast metabolism like me and is slim and small for her age so I definitely don't want to restrict food or make her 'wait' if she's hungry... But then I lose the structure of mealtimes as she doesn't eat much at proper meals. I do give her snacks, obviously, this is on top of what she has normally. I feel like she'd graze all day, given the chance. Not sure what to do really, suggestions?