Interesting and very difficult
no the rat that doesn't have babies might eat the babies be safe with the babies
yes, like all mammals, rats feed their young milk. rats actually take wonderful care of their babies, and if it doesn't seem that your rat (if you have one) is feeding its' babies, it's probably because something is wrong and she can't. but yes, rats do feed their babies.
No, mice and rats are two different species. Rats have rat babies, mice have mouse babies.
when its ready
No unless interaction from a male rat (such as getting a rat that is about to have babies). two female rats can not have babies
60 babies
no a naked mole rat can't have babies with a rat
a white rat --> un rat blanc -- "eh[n] rah blah[n]"
The fmale rat will sniff the male rat, while he sniffs her at the same time. You will need to watch them for about an hour to make sure they don't fight. If you do not want babies, keep them separate. The male rat will try to mount the female rat, if he is not spayed. If you do want babies leave them together for 10 days (If they don't fight.), and you will surely have babies 21 days after she got prego.
Rats are living things and biology is the study of life so rat breeders help rats have offspring(babies) and those rat babies are living... hope that answers your question
The least amount of Babies to be born is of course one
when she bangs another rat