While the Collie- as she was is a real dog breed, it should be understood that (Lassie) was a fictional character. No real animal could survive all of the assorted mishaps, kidnappings, accidents, forest fires,....and the ASPCA would not permit such hazardous stunts- of necessity there were different Lassie dogs trained for different stunts- a fight sequence Lassie ( with another animal) would be a different temperament than a cuddly pet humanitarian Lassie. For some bizarre reason the entire series was chemically devoid of the least traces of comedy, heavy fare for tykes, and no comic relief. The novels were even more downbeat.
The real name of the first dog to play Lassie was Pal. Pal was an American collie who starred in the 1943 film "Lassie Come Home" and went on to portray the iconic character in several other movies and the TV series.
Lassie - 1954 Lassie and the Calf - 8.34 was released on: USA: 13 May 1962
Lassie - 1954 Lassie's Vanity - 3.19 was released on: USA: 13 January 1957
Lassie - 1954 Lassie's Day - 3.23 was released on: USA: 10 February 1957
Lassie - 1954 Lassie's Interlude - 17.1 was released on: USA: 20 September 1970
Pal has: Played Lassie in "Lassie Come Home" in 1943. Played Bill aka Duke in "Courage of Lassie" in 1946. Played Larry in "My Brother Talks to Horses" in 1947. Played Lassie in "Hills of Home" in 1948. Played Lassie in "Challenge to Lassie" in 1949. Played Lassie in "The Sun Comes Up" in 1949. Played Shep in "The Painted Hills" in 1951. Played Lassie in "Lassie" in 1954. Played Lassie in "50 Greatest TV Animals" in 2003.
Lassie was a Collie.
Lassie - 1954 Lassie and the Bird Watch - 10.1 was released on: USA: 29 September 1963
Lassie - 1954 Lassie's Day 3-23 was released on: USA: 10 February 1957
Lassie - 1954 Lassie and the Greyhound 7-33 was released on: USA: 30 April 1961
Lassie - 1954 Lassie's Ordeal 9-9 was released on: USA: 25 November 1962
Lassie - 1954 Lassie and the Piglets 10-24 was released on: USA: 22 March 1964