Savaged (2008)

When Marian Longosi goes into hiding to escape her abusive ex-boyfriend she takes a job house-sitting. This results in her acquiring a canine with some odd habits as roommate. The small town seems safe enough but first, but Maria soon learns there's a black bear on the loose and then the police find the body of slaughtered man. To top it all off Jeff, her ex, is doing everything he can to keep in touch. Has Maria really found the safety she's been seeking in this small town or will her new fierce protector prove to be more dangerous than anyone would dare to guess? There's only rule when caring for this canine: Don't let her out after dark!