I've decided to call him Norbert,' said Hagrid, looking at the dragon with misty eyes. 'He really knows me now, watch. Norbert! Norbert! Where's Mummy?''He's lost his marbles,' Ron muttered in Harry's ear.'Hagrid,' said Harry loudly, 'give it a fortnight and Norbert's going to be as big as your house. Malfoy could go to Dumbledore at any moment.Hagrid bit his lip.'I- I know I can't jus' dump him, I can't.'Harry suddenly turned to Ron.'Charlie,' he said.'You're losing it too,' said Ron. 'I'm Ron, remember?