worms,(tape,pin,hook, etc) bacteria as in coccidia or cryptosporidium(no cure)......they could carry and not show...you feed, you got disease in colony....all mice interact, all mice might be contaminated by flies walking from tank to tank...tub of snakes to tub....

get the idea....

wild baby mice with no mother.....

trash can......unless I have a wild snake brought here ny police or kids......then I would feed till I release....

but we don't keep wild stuff with captives....do we.....

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........JY