Foo-Foo was performed by Steve Whitmire, but according to Whitmire:
|“||I think [getting the part] was largely because Dave was going to do it but he didn't really want to do it. Foo-Foo was kind of a prop for Miss Piggy in a lot of ways. It was just something for her to play off of. ||”|
In 2011, during the promotion for The Muppets, Miss Piggy told People Magazine that she has had to "re-home" Foo-Foo. As Piggy told People, "[Foo-Foo] really didn't much care for Kermit, it seems... She seems to be prejudiced against green people. Anything the color green, she would nip at. So in order to have a future with my Kermie, I had to make that sacrifice." Piggy assured People that she is sending Foo-Foo to pet therapy, and she'll be happy to welcome her dog back home when she gets over her aversion to Kermit. 
On The Muppet Show, Foo-Foo was portrayed both by a puppet and a live dog. A 1979 issue of The Muppet Show Fan Club newsletter (vol. 2, no. 2) provided a behind-the-scenes scoop: "Can you tell which is the live dog and which is the puppet? Miss Piggy's new dog, Foo-Foo, is not really one puppy, but two. The one on the left is a puppet, modeled on the live dog on the right. It took a long time to find a puppy small enough to be in scale with Miss Piggy. The live Foo-Foo was born on December 13, 1978. She is a special sort of toy poodle and is one of the last ten of her particular line, a line bred down to the smallest possible size from a standard poodle. Foo-Foo is still growing, and as she grows, the puppet Foo-Foo will be rebuilt to match. When fully grown, she will still be less than nine inches tall. Watch carefully when Foo-Foo is next on the show -- if she's running around, it will probably be the live version. If she's reacting in close-up, it will probably be the puppet... but you can't be sure...!"
- The Muppet Show
- The Muppets Go to the Movies
- The Muppets Take Manhattan (Wedding Finale)
- The Muppets: A Celebration of 30 Years
- A Muppet Family Christmas
- The Jim Henson Hour
- Here Come the Muppets
- Muppets Tonight
- Kermit's Swamp Years
- The Muppets' Wizard of Oz (performed by Alice Dinnean-Vernon)
- The Muppets Kitchen with Cat Cora
- Birthday Cat-astrophy
- Two for the Show (1982)
- Foo-Foo, Where Are You? (1991)
- The Phantom of the Muppet Theater (1991)
- Miss Piggy Sound Board Book (1995)
- Muppet Time (1996)
- Muppet Snow White (2010)
- ↑ Plume, Kenneth. "Ratting Out: An Interview with Steve Whitmire", Muppet Central. July 19,1999.
- ↑ Jones, Oliver and Raftery, liz. "Muppet Mess: Miss Piggy Forced to Choose Between Her Dog and Her Frog", People.com. Nov 11, 2011.