some cats react funny if they smell the sent of a dog on your fur. maybe the rat smelled something she was scared of on your parents clothes. just make sure they get individual attention, and i cant tell you enough that rat babies can get pregnant at such an early age. i mean 8 weeks, yeah im serious. on of my friends had a litter of rats and at nine weeks 3 of her females were pregnant. they died during labor. i dont mean to be depressing i just want you to know that it is not a thing to put off.