i know we have mice, i can hear them in the walls.. scurrying around
she wasn't bothered by them last winter, and shes not made a fuss during the day when its been moving around..
she does like to catch mice, but she doesn't growl at them.. and we have gerbils so, im pretty sure she used to rodents in the house anyway

tryed getting her to find it.. she sniffed around.. then had a mad episode and ran around a lot

shadows don't bother her.. and she will snap at flys, but never growl or bark at them.. or back off whineing

my guess is maybe the wind is makeing an odd sound in the chimney, maybe sounding a bit like growling or something..
would be useful if she could just tell me really