Hello, Hungry Tortoise, and a very warm welcome to The Cold Dark Room.Welp
Pull up an armadillo to sit on and try not to sit on a hedgehog.
The Leprechaun One-Legged Pirate Substitute will fetch you a beverage of choice.
The snow leopard would like a carrot.
I understand you have a Russian tortoise?
Please have a read of https://tortoiseforum.org/threads/beginner-mistakes.45180/
and https://tortoiseforum.org/threads/russian-tortoise-care-sheet.80698/
It is quite normal for a tortoise to be picky in it's eating and get bored of just having one choice of food. This is why it's important to offer a nice selection of different foods. If the tortoise still refuses to eat what is good for him and wants only one type of food, then just wait. As long as your set up and especially temperatures are right, he will eat when he gets hungry. And make sure his enclosure is at least 8 feet by 4 feet, Russains need a large area to roam to aid in their digestion, stop them getting bored and be able to exercise their muscles properly.