Do boxing turtles eat grass

They prefer to eat greens such as dandelions, collared greens ,mustard greens, fruits and veggies (strawberries, cantaloupe, berries, mango, peaches, tomatoes, broccoli, carrots, beats, and hibiscus flowers), fungi (mushrooms), and animal matter (crickets, slugs, earth worms, hard boiled eggs [mashed up], and snails). I don't see why they wouldn't eat grass or couldn't but they don't like it as much as the other food items.