cats do not typically engage in organized singing as a group. Cats communicate through various vocalizations such as meowing, purring, hissing, and chirping, which serve different purposes such as expressing needs, emotions, or warnings.
The cat group you are referring to is likely singing about a variety of topics, as cats are known to do. Some common themes in cat singing include expressing affection, expressing territoriality, and communicating with other cats.
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