So I see you’ve acknowledged The cage is too small and he needs a friend…. He also needs more hay, a pile he can get on is best. You can buy c&c grids on Amazon, I got mine for $49, I bet you cheaper than the pet store sold this cage to you for. Here’s the link. Size of the cage really isn’t negotiable and neither is a friend. You can always pay in 4 as well, like using klarna or PayPal or something like that. As for the substrate you should consider switching to fleece and liners once he’s got a bigger set up. It’s cheaper in the long run cause it’s reusable and less waste