Is this normal with Rats?

[Caxis]

We have 2 female Rats, we bought about a week ago, and they were not very old. Now, at night time, I keep hearing them squeak and fight. I am wondering if this is normal in Rats, because we have never owned 2 Rats in the same cage.

[tikeyas_mom]

rats are very VERY social! they need to have company i bet the aqueeking you are hearing is juist your ratties play fighting, nothing to worrie about, inless you find blood in cage or on one rat.