You don't. Let nature take its course and perhaps end its life sooner and quickly.
Is the mother a mouse? Is the father a mouse? Then yes, it is a mouse.
The baby mouse can leave it's mother when it's about four weeks or older. At that time, the baby mouse is fully weaned of mother's milk. The baby mouse should also be eating solid foods as well.
after like 6 months
That can only mean that the baby mouse will die soon...
Yes, a mouse will nurse young from another mother if the other mother is removed or deceased
YES! In the wild, when an rat or mouse dies, the mother eats them because the scent will attract predators...So the mother eats it to protect the family/group from predators...Remove the dead baby mouse because otherwise the mother will eat it and there is no telling what that could do to the mother...
No way. If the baby mice are in the cage long enough with the mother mouse, the mother mouse will indefinitely eat the babies.
Possibly for yawning as wants to sleep :)
It depends on what relation ship the baby has with the adult. if it is its mother than probably. but keep quiet, any sudden noises can scare the mother and this can result to it eating its young. if it is a male mouse than this may not be a good idea as they are very territorial and may kill the baby.
15 days
the mother might reconize her baby. but the child will not. it really depeands on how long they have been separated. if the does reconize her baby she might want to protect it by eating it. the baby might want to fight the mother. so it might not be a good idea unless they have seprate cages. from Kennedy age 11
When a foal is separated from its mother it is called weaning. It is called that because you wean the foal from the mothers milk