Solid Silver Drinks

I found a baby mouse when he was 2 days old. Some of you know him. His name is Dhiren. Because of all of your help he now drinks water and eats solids. He didn't get a friend to live with him. I tried and the other mouse was 1 week older then him and the other mouse would not stop trying to beat him up. He now has lots of fun toys and a lot of room to play. He's now 4 1/2 weeks old. We made it through the rough parts. Now what I would like to know is what breed is he? The color of his hair is silver/ grey. Thank You Jamie
I found Dhiren outside a mall. He was burnt realy bad from being on the pavement for I don't know how long. I was thinking maybe he was in a nest in a car and fell out. He does let me play with him. I hold him as he eats and he takes naps in my hand. When I placed him in his cage I would tap on the glass and make a snapping sound to let him know I'm there. He always comes out of his castle so I can hold him. I'm the only one he does this for.