Here's another passage about the cats, from "Islands in the Stream," like the other one:
“.. The cats were very odd about catnip. Boise, Willy, Goats, Friendless’s Brother, Furhouse, and Taskforce were all addicts. Princessa, which was the name the servants had given Baby, the blue Persian, would never touch catnip; nether would Uncle Woolfie, the gray Persian. With Uncle Woolfie, who was as stupid as he was beautiful, it could have been stupidity or insularity. Uncle Woolfie would never try anything new and would sniff cautiously at any new food until the other cats had taken it all and he was left with nothing. But Princessa, who was the grandmother of all the cats and was intelligent, delicate, high-principled, aristocratic, and most loving, was afraid of the odor of catnip and fled from as though it were a vice. Princessa was such a delicate and aristocratic cat, smoke gray, with golden eyes and beautiful manners, and such a great dignity that her periods of being in heat were like an introduction to, and explanation and finally exposition of, all the scandals of royal house. Since he had seen Princessa in heat, not the first tragic time, but after she was grown and beautiful, and so suddenly changed from all her dignity poise into wantonness, Thomas Hudson knew that he did not want to die without having made love to a princess as lovely as Princessa...”