If you have a bird when you have a second cat, at first, "I" should not doubt that it was bitten by the second cat, because "I" like the second cat very much. It is interesting and lively, and it has strong skills (catching mice and climbing trees). Then, "I" can't jump to conclusions without evidence; Finally, even if the second cat eats the bird, I won't treat it like the third cat. (Also, in the last article, where I thought the third cat ate the bird, there was also a foreshadowing in paragraph 17 that Embryo Cat ... glared at it, so I also ruled out that the second cat ate the bird. )
If the second cat eats the bird, "I" should not hit it or scold it, but just ignore it for a few days.