Merv in the 2025 movie “Merv” is played by a terrier mix.
Dog breed in “Merv”
Several articles and cast interviews describe Merv as being portrayed by a rescue dog named Gus, who is specifically identified as a terrier mix rather than a purebred dog. Features pieces about the film also note that multiple “Merv-alike” dogs were used, but the main canine star Gus is consistently referred to as a rescue terrier mix.
