Male Hamster - Bika

male hamster, his name: Bika (Bikachu), he is almost 3 years with me, he is very very adorble, calm and freindly. I traind him to use a potty and he knows how to use it very well every time, which makes his home clean and the cleaning procces every weak for me easy.

but you have to clean his potty in two days in a row, and change it once in a week or when it is very dirty, otherwise he will makes his home dirty. He dont live in a cage, i put him in a big plastic clear storage box with every thi