Constructing an outdoor enclosure for cats can ease the transition from roaming freely outdoors to being confined, especially if the cat is used to coming and going as it pleases. These enclosure, sometimes called katios allow cats to be outdoor while keeping a barrier between them and birds rodents and small reptiles. They prey on what is the effect of the word especially in the sentences

The word "especially" in the sentence emphasizes the potential benefit or advantage of constructing an outdoor enclosure for cats. It highlights that the enclosure is particularly helpful for cats who are accustomed to freely roaming outdoors and allows them to adjust to a confined environment more easily.