when we got our baby leo, he was kinda picky too.
he'd only eat certain things.
so we tried rep-cal tortoise food.

you add a small amount of apple juice or water to the pellets so they become soft.
our leo prefers apple juice being added. i guess it just makes them taste even better.
they are all different colors & flavors so your tort gets a variety.
& they're often called tortoise fruit loops.
my leo, alfred, & my rf, zoe, LOVE them.

My boy Pickle loves dandelions- won't tough grass or orchard hay- you can also talk one of your local produce companies or a specialty grocery store's produce guy, and they can bring in cactus pads or dandelion greens for you-

I agree with the above poster. My baby isn't too fond of hay either, but eats dandelions, clover, and other fresh weeds with great enthusiasm. Experiment with different things, maybe he'll prefer a broader leafed weed.