Final answer:
Fred and George were shocked when their pet owl had flown away.
Step-by-step explanation:
Fred and George were shocked when they found out that their pet owl had flown away.
This information is not explicitly stated in the given excerpts, but there are clues and context that suggest this possibility. In the second excerpt, the guest mentions that he is making a collection of birds and has been searching for rare ones for years. This could imply that he has captured Fred and George's pet owl. In the third excerpt, George Hadley notices something in the corner near where the lions had been, and when he shows it to his wife, she asks what it is. This object could be a clue to the disappearance of the pet owl.