Well, I don't use Hide boxes because the enclosure has a couple places that they can hide if they want. They rarely use them.
As far as feeding, Mine love any kind of leafy vege, Lettuce, greens etc....
Buy romaine lettuce and I guaranty they will eat it up. They also eat green beans and yellow squash. ...Apples...Bananas....
I occasionaly throw a couple pieces of Cereal, like cherrios, in the enclosure as a treat. They seem to love that.
Good luck

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Ken
If you kill it, You better be willing to eat it!
2 Bearded Dragons
1 Iguana
4 Oscars
2 Dogs
2 Children