Theo just sneered at him silently, but Hermione saw no reason to be rude. "No, I’m afraid not," she said politely. "Is he your familiar? Crookshanks here is mine – we’re very closely bonded now. Have you tried a spell to find him, or simply reaching out with your magic? That’s what I do when Crookshanks isn’t around and it’s time for his dinner. Sometimes it works."