New York City enacted Intro 4, a local law approved by New York City Council to prohibit pet stores from selling guinea pigs. New York City Council passed the law on April 11, 2023, and Mayor Eric Adams returned it unsigned on May 16, 2023. In New York City, if the mayor does not sign or veto a bill within thirty days, it becomes law. The NY city animal shelter system reportedly experienced nearly 1,000 guinea pigs surrenders during the past year.