(written from a Production point of view)
This page contains information regarding Star Trek: Picard, and thus may contain spoilers.
Dinero is a rescue dog, with little previous film experience. "Remembrance" director Hanelle M. Culpepper described Dinero as "very green" (that is, inexperienced) and "a challenge sometimes, but super, super sweet." Writer/producer Michael Chabon agreed, saying, "He was the sweetest dog. He was not a great actor." Culpepper noted that Number One was present in more scenes in the original script than in the episode as filmed, saying "we both agreed, let's leave the dog out of this one." (The Ready Room: "Remembrance")