Blair: Blair was the first to appear in movies in history. In 1905, Blair appeared in the movie Rescued by Rover . It is a British film that a baby is kidnapped by an old woman, but the faithful family dog Rover saves the baby at last. 

Though Rover is a common name, it became popular because of the dog hero in the movie. 

Lassie: lassie used to be the most famous dog in the world. She is a character who has starred in many movies, TV shows and books over the years. 

Lassie was created by Eric Knight and made her way into a short story in a newspaper in 1913 and into a novel in 1940. 

Laika: Laika is the first animal that has orbited the earth. On November 3, 1957, Laika was sent to space in the Soviet Union's Sputnik 2.(2). The Soviets admitted soon after the launch that the spacecraft would not return. It meant that the poor animal would die. People argued a lot about Laika's death. Several countries issued stamps in memory of Laika. She became the first animal to give her life for the exploration of space. 

Rin Tin Tin: Rin Tin Tin is the first American dog movie star. He first appeared in WhereThe North Begins in 1925. Rin Tin Tin went on to make 25 movies, he even signed his own contracts with paw prints . During his best time, he earned about 5 million dollars for those people who worked for him. 

Snoopy: snoopy may be the most famous cartoon dog in the world. As a hunting beagle from Charles Schultz' popular newspaper comic strip , Peanuts, snoopy first appeared in 1950. Though snoopy was at first a minor figure, he grew to become the strip's best-known character. He is famous for always sleeping on top of his doghouse and sometimes dressing up and pretending himself as a World War I airplane pilot. Snoopy appeared in the Peanuts comic strips until Schultz's retirement ( and death ) in February of 2000.
When was Laika sent into space?
on which spacecraft?
For which country?
Did she return to Earth?
When did Snoopy first appear in comics?\
What was the name of the strip?
Created by whom?
What breed of dog was he?
What did he sometimes pretend that he was?
When did he stop appearing in comics?
Why?
How many movies did Rin Tin Tin appear in?
Did he sign contracts?
How?
Who created the character Lassie?
What year was her novel written?
Which movie made the name Rover popular?
In what year?
What country created the film?
Who was the first American canine movie star?
On November 3, 1957
 On November 3, 1957, Laika was sent to space 
Sputnik 2.
On November 3, 1957, Laika was sent to space in the Soviet Union's Sputnik 2.
Soviet Union
On November 3, 1957, Laika was sent to space in the Soviet Union's Sputnik 2
no
The Soviets admitted soon after the launch that the spacecraft would not return. It meant that the poor animal would die. People argued a lot about Laika's death.
in 1950
Peanuts, snoopy first appeared in 1950
Peanuts
As a hunting beagle from Charles Schultz' popular newspaper comic strip , Peanuts, snoopy first appeared in 1950
Charles Schultz
As a hunting beagle from Charles Schultz' popular newspaper comic strip , Peanuts, snoopy first appeared in 1950
hunting beagle
As a hunting beagle from Charles Schultz' popular newspaper comic strip , Peanuts, snoopy first appeared in 1950
A World War I airplane pilot
He is famous for always sleeping on top of his doghouse and sometimes dressing up and pretending himself as a World War I airplane pilot
yes
Snoopy appeared in the Peanuts comic strips until Schultz's retirement ( and death ) in February of 2000.
Schultz retired and died
Snoopy appeared in the Peanuts comic strips until Schultz's retirement ( and death ) in February of 2000.
25
Rin Tin Tin went on to make 25 movies
yes

Rin Tin Tin: Rin Tin Tin is the first American dog movie star. He first appeared in WhereThe North Begins in 1925. Rin Tin Tin went on to make 25 movies, he even signed his own contracts with paw prints . During his best time, he earned about 5 million dollars for those people who worked for him. 
with paw prints
Rin Tin Tin went on to make 25 movies, he even signed his own contracts with paw prints
Eric Knight
Lassie was created by Eric Knight
1940
Lassie was created by Eric Knight and made her way into a short story in a newspaper in 1913 and into a novel in 1940. 
Rescued by Rover
the movie Rescued by Rover
In 1905
In 1905, Blair appeared in the movie Rescued by Rover 
Britain
It is a British film that a baby is kidnapped by an old woman, but the faithful family dog Rover saves the baby at last. 
Rin Tin Tin
Rin Tin Tin: Rin Tin Tin is the first American dog movie star. He first appeared in WhereThe North Begins in 1925. Rin Tin Tin went on to make 25 movies, he even signed his own contracts with paw prints . During his best time, he earned about 5 million dollars for those people who worked for him. 