It's not a deer mouse, just a reg house mouse I caught.
I've googled around and haven't found much except that they may be carriers of hantavirus.
I live in a city. There aren't any fields nearby except maybe the county park about a block away, maybe it came from there?
Anyway... has any one had success in breeding these wild types? I have read somewhere these species is very much different from your per-store stock and shouldn't be placed together.
But as an experiment, do you believe this can be achieved?
ADDING: Btw, my comparison these pet-store stock look much bigger, healthier maybe than these wild type. This one in particular seems to be a female, and is obviously much thinner. Overall, the snout looks pointier?