It wasn't needed to bring in any real cats to the studio for the animators to study their movements; they simply looked at any of the millions of cat videos on YouTube.
This film alludes heavily to The Mask of Zorro (1998), a film which also starred Antonio Banderas as the lead.
Antonio Banderas took part in a viral marketing event for this film by posing in photos of himself at a screening, surrounded by cats.
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