Final answer:
Queenie's hindquarters were not deteriorating after all. The weight of Queenie's tail on her hindquarters made it harder for her to walk.
Step-by-step explanation:
From the passage, it can be inferred that Queenie's hindquarters were not deteriorating after all. The fact that her gait picked up and she walked normally when her owner lifted her tail suggests that the weight of her tail on her hindquarters made it harder for her to walk. This indicates that her hindquarters were not the main issue causing her difficulty in walking.