Rats very much enjoy the company of other rats. Putting males and females together however will quickly result in over population.
To introduce two rats take them to a neutral area away from their cages. Say a table or a bed or the floor. Let them sniff and touch for awhile and then after a bit put them away into the same cage. Rats do tend to play fight and wrestle alot..there can be squealing, as long as they are not injuring each other it is all normal.
Yes, actually it gives the rat stimulation and enjoyment.
Because rats are smart and play with you
Yes. They like to live together.
if born together then separated they will be territorial if reunited
No and they should not be kept together either.
The plague was spread by fleas that lived on the rats.
No, they live together.
Mice and rats are natural enemies of each other. Putting them together would result in the rat killing the mouse.
Yes, a number of rats living together will develop a pecking order with one rat being dominant.
no a naked mole rat can't have babies with a rat
No. I suggest you don't try that.
No. Leave the mother & babies together, but if there are other rats, take the other rats out. Mum & bubs need to stay together, otherwise the bubs will die.