What kind of dog is in Men in Black?

What kind of dog is in Men in Black? - briefly

The dog featured in "Men in Black" is an alien disguised as a dog. It is specifically a Flooka, an extraterrestrial species from the planet Sirius.

What kind of dog is in Men in Black? - in detail

In the iconic film "Men in Black," the alien disguised as a dog is known as Frank, played by the talented Muggsy. Frank is not an ordinary canine but rather an extraterrestrial creature that has taken on the form of a dog to blend into human society. The specific breed of dog that Frank resembles is a Jack Russell Terrier, a small and energetic breed known for its distinctive white coat with black or tan markings. This choice of disguise allows Frank to move about undetected while also providing a comedic touch to the film's narrative.