Sandy: I don't think he loves her.
Ken Kessler: Well, let's face it, she's not Mother Teresa. Gandhi would have strangled her.
Ken Kessler: Sandy, it's over. Sam isn't going to pay the ransom, he couldn't care less. I'm no criminal. I can't even sell retail, and that's legal.
Carol: You get that tape of Sam Stone finishing off his wife, and that man will give us anything we want for the rest of his life.
Earl Mott: Yeah! Then we're off to Haiti.
Carol: Not Haiti, Tahiti.
Earl Mott: Oh... I knew that.
Sandy: No matter what I do, there's nothing I can say... she just tears into me! She hates me.
Ken Kessler: Sandy, you're her kidnapper. She's supposed to hate you.
Ken Kessler: I mean, what the hell's the point of being a decent person when no-one is? Let's be assholes and get rich.
Answer: So she's more concerned about her own life than the life of the dog. Or since she believes that her husband "worships the ground I walk on," she probably takes for granted that her husband will take care of the dog. Or she does talk about it but it's not important to the plot.