No, the poet does not in fact say that the fog is like a cat. However, he has used cat as a metaphor for describing the fog. He says that the fog comes on its little cat feet, which implies that the fog is like a cat as it comes gradually. He also says that the fog looks over the dock, implying that the fog has covered the city and is looking at it. He again compares it to a cat. This is reiterated when he says that the fog looks over the city sitting on ‘silent hunches’. This also shows the reference to a cat as a cat all the time sits with its knees bent. Hence, he has compared the fog to a cat without in reality saying so.

For more answers visit to website:
https://www.tiwariacademy.com/ncert-solutions/class-10/english/first-flight-chapter-8/