so i looked into the tub where the new rats are, and momma decided to move them out of the bare corner into their hide. she ferried each one of them across individually in her mouth, but with 2 of them she stopped off and gave them to dad. he didn't really do much with them. now he's in the hide, and she's running in the wheel, and the 2 babies she left with dad are helplessly rolling around in the shavings. is this normal? is there a possibility these babies are "defective" and going to get eaten?