own parenting experience with his daughter, Dione, who voiced Uli in the film. Rodolfo also explained that the theme of collecting eggs and endangered animal species for expensive food served as the basis for the screenplay, after he and his brother Gabriel read articles on the topic. Casting Before the animation process, much of the actors had recorded their lines for adaptation. Music Zacarías M. de la Riva, a Spanish composer who previously worked on Un gallo con muchos huevos, has returned to compose this film with a 75-piece orchestra performance in Bratislava. It was originally planned to be scored in Bulgaria. As with Un gallo, Zacarías has faced challenges in composing music in animated films, as it required the balancing of adventure, drama and comedy. Despite this, he called it "a great joy" and "truly [marvelous] to [be working] again with directors Gabriel and Rodolfo Riva-Palacio." The composer added that the film reused some music pieces from his work in Un gallo. Soundtrack The film's score soundtrack album was released digitally by MovieScore Media on August 13, 2021. Release The film was originally planned for a 2019 release in Mexico, and then August 2020, but has been postponed due to the ongoing COVID-19 pandemic. The film's first poster was released in March 2020, followed by teaser trailer was released on 10 April later that year. It was officially released in theaters in Mexico on 12 August 2021. Co-director and co-writer Rodolfo Riva Palacio Alatriste told an interviewer at M2 that being able to make four films is a "surprise", reflecting on the release of the franchise's first film released in 2006. The film was later released in the United States in limited release on 27 August 2021 through Pantelion Films. The film's directors Gabriel and Rodolfo Riva have expressed that they will "compete against the United States" and are "capable". The film was dedicated in memory of Mexican voice actors Pepe Lavat and Lulu Morán, who died in 2018 and 2019 respectively. Internationally, the film was released as Little Eggs: An African Rescue. Critical reception The film opened mixed to favorable reviews from critics, with many praising its improving animation, humor, faithfulness to the franchise and its design, and its "important" messages. On Tomatazos, it has a 100% rating of positive critic reviews. It currently has no score on the mainline Rotten Tomatoes. Monique Jones of Common Sense Media