Despite being a fictional character, Lassie is one of the most unforgettable characters in television. Originally the role was played by the Rough Collie named Pal.
In the early 1920's, Gunnar Kaasen posed with his dog Balto, who led the dog team that Kaasen drove through a blinding blizzard to help deliver life-saving serum to Nome, Alaksa.
The female dog who traveled to outer space as a passenger aboard Sputnik II.
The Japanese Akita who became a national symbol of loyalty and faithfulness after waiting for his owner at the same place every afternoon for nearly 11 years after his owner's death.
Rin Tin Tin, who's credited for making German Shepard dogs popular as pets, was rescued by Lee Duncan from WWI. Duncan trained him and got him silent film work. He became a huge hit, featuring in 27 Hollywood movies.
Spike was the real name of the dog actor. He was a homeless dog found in Van Nuys, CA.
Originally named Terry, the female Cairn Terrier earned US$125 per week, which was more than many of the human actors earned at the time.