How did Freddie develop his dislike for cats as noted in The Most of P.G. Wodehouse?

In "Farewell to All Cats," Freddie's weekend at the Prenderby family estate, Matcham Scratchings, is described. At the estate the family kept a great number of animals. In his room, on separate occasions Freddie found a cat scratching up his shirt and a dead cat lying on his bed. His response was to throw the cats out the window, but both times he had the misfortune of hitting Lord Prenderby.