Try butternut squash. The color sometimes stimulates them to eat and you can sprinkle calcium powder on it.
He is small for his age, but his shell looks good. I think most grow too fast in captivty. but yours seems to have something else going on. Real sun is a must when you can.. and you are going to need to plan for the future.. if he grows, he will get big and you cant keep him inside.
Look at building or getting a Loafing Shed. Tuff shed makes them so you can get an idea of what they look like. It has a shed area you can heat with a doggie door for access and a outdoor covered area. You can place a heat lamp outside in the winter. it is covered so even if it snows there is a area to feed and walk around.. good luck with him, keep him warm and lights on a good part of the day. if its too dark, they wont be active or eat either.
He is small for his age, but his shell looks good. I think most grow too fast in captivty. but yours seems to have something else going on. Real sun is a must when you can.. and you are going to need to plan for the future.. if he grows, he will get big and you cant keep him inside.
Look at building or getting a Loafing Shed. Tuff shed makes them so you can get an idea of what they look like. It has a shed area you can heat with a doggie door for access and a outdoor covered area. You can place a heat lamp outside in the winter. it is covered so even if it snows there is a area to feed and walk around.. good luck with him, keep him warm and lights on a good part of the day. if its too dark, they wont be active or eat either.