Young Mice/Eyesight

Question
I have just acquired three mice. One of them was wild, very recently weaned (not sure if totally weaned, but the mother is no longer around...this one had a head out of proportion to the body, but now looks more like a miniature adult mouse). The other two are darker in color, formerly "feeders" and are about the same age as the wild mouse. I got them to be company for the wild mouse and all three of them get along very well. They're all eating solid food and drinking water on their own and sleeping together.

My question is about the two black mice. When I got them from the pet store their eyes seemed to be open, but now they seem to be shut a lot of the time, even when they're out and about eating or running and climbing. Is this normal? The wild mouse's eyes are fully open and alert.

Thanks for any information you can give me. I've looked on the internet, but can't find any information about this.

Sincerely,
Kristina

Answer
Maybe the wild mouse has given something to the others.   However it could be something else. Are the eyes fully closed or just half closed.  If half closed they are probably still young so spend time sleeping more.  YOu should consult a vet on this matter