There were two Beagles portraying Porthos, who were supplied by Performing Animal Troupe, an animal supply company for film and television. These dogs included a female Beagle called Breezy, who was the main dog actor who played Porthos during season two. Breezy was the original double for male dog actor Prada who appeared in the first-season episodes of "Enterprise" up until "Two Days and Two Nights", when Breezy became the main dog. She had also previously appeared as Lou in the 2001 film "Cats & Dogs".