u/Odd_Pin_4090

Hi guys,
So I this new Dwarf hammy, he’s a male and 4 months old as told me previous owner. its his first day here. He seems very curious and is exploring her cage, but he’s unable to move the wheel. Is he very small and should I get a smaller wheel?
Its a 11 inch niteangel wheel.

suggest me how big and which material i should buy for him so he can play freely☺️

Update : Thank you everybody for soo many suggestions. I was able to fix it with one of your suggestions. Loosened up the screw from behind and removed some bedding.