The content does justice to the title. It is, in fact, a story of power, strength, control, domination and subjugation.
It may not be in absolute agreement with the naturalistic tradition/credo, that is, it may not be a true naturalistic story, but is there the perfect one? Garland is more in tune with "veritism", which is based on apparent truth/reality, on the reproduction of life and on value judgements rather than on scientific objectivity and precision, as is the case of the naturalists.
His stories include feelings such as indignation and happiness. They include good and bad people instead of just people. And they include human sympathy, which, in my opinion, makes for a much more powerful story. That is why I preferred "Under the Lion's Paw" to "A Day's Pleasure" and "Mrs. Ripley's Trip". It is filled with conflicts and dichotomies which are a part of everyday life. It deals with survival, which is undoubtedly one of the most dramatic problems of our planet. And it deals with "use and abuse" of people and power, or prepotency, another common human trait. I have moral authority to speak against it because I was one of its victims in a recent past!