How many babies do wild rats have?

Answer 1

I don't know about for Rattus Rattus (roof rat or black rat), but Rattus Norvegicus (the brown rat) can have up to twenty-two, but twelve is a more likely number. Same applies to pet rats, as they are also Rattus Norvegicus, just domesticated.

Answer 2

They can have many babies, 6 is not unusual. They can have 12 or more though, it often depends on many things. Sometimes it's genetic, whereas it can also depend on how well fed and sheltered the mother rat has been.

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Answer 3

they can have around 1-8 babies, but that is just the usual average so they can have more than that.