It's not his voice, it's the cat's voice. The cat is freaking out. He's freaked out because she's running around with her cat, and he's worried that they're going to get into a fight. He tries to calm her down by saying that he'll send her a message, but she won't listen to him. She's still running around, though, and she doesn't want to see him, so she'll just go home and eat some food.