Alfred Hitchcock is known to have owned at least four Sealyham terriers in his lifetime - Mr. Jenkins, Geoffrey, Stanley and Sarah.
Hitchcock loved and pampered his terriers. According to Hilton Green, assistant director of Psycho, "...those dogs ate better than most people in the world. I mean, he would go to the store and get the finest cut of meat and have them ground it up for these dogs. They were wonderful! He would bring them to work. They would be in his office, and he loved them dearly."
In his film The Birds, Hitchcock did a cameo appearance with Geoffrey and Stanley. He can be seen walking his terriers out of a pet shop as Melanie Daniels (played by Tippi Hedren) enters.
Hitchcock also named his production company for the film Marnie after his two terriers - Geoffrey Stanley Productions.