After you open the secret door and collect all of the golden eggs, do the good ending (don't pop the dinosaur balloon) and then die to respawn. In the lobby the cat will be sitting in front of a computer, and in the nearby refrigerator you can get the milk and feed the cat! Also after the cat is fed you can go downstairs and the cat will be sleeping with the chicken on the chair in the corner. :)

引用自 strwbrry：

After you open the secret door and collect all of the golden eggs, do the good ending (don't pop the dinosaur balloon) and then die to respawn. In the lobby the cat will be sitting in front of a computer, and in the nearby refrigerator you can get the milk and feed the cat! Also after the cat is fed you can go downstairs and the cat will be sleeping with the chicken on the chair in the corner. :)

Thank you!