He was shot. One of the guys who stayed in the house convinced Candy to let him put the dog out of his misery. Candy later regretted not taking the responsibily himself.
Candy doesn't want to shoot his old dog because he has had the dog since it was a puppy and they have grown old together. Candy is emotionally attached to the dog and can't bring himself to end its life, even though he knows it is suffering and needs to be put out of its misery.
Candy's dog is shot and killed because it is old and no longer useful, similar to Candy himself who is also aging and feeling useless. This event makes Candy feel afraid that he will also be cast aside if he becomes too old or unable to work, so he decides to work on the ranch for as long as he can to have a sense of security and belonging.
i think you are talking about 'of mice and men' and if so candy is told that his dog should be shot at the back of its neck to give it no harm but to get rid of it.
Candy compares himself to his old dog that was shot by Carlson, expressing fear of becoming useless and unwanted like his dog. He sees himself doomed to a similar fate of loneliness and disposability once he is no longer able to work on the ranch.
Carlson's problem is that he dislikes Candy's old and smelly dog, claiming it is of no use since it is old and sick. He tells Candy that he should put the dog out of its misery by shooting it.
Carlson suggests killing Candy's old dog because he believes it is suffering and no longer serves a useful purpose. This suggests that he values practicality and efficiency over sentimentality or compassion for others. It also reveals a lack of empathy and understanding towards Candy's attachment to his dog.
Carlson wants to shoot the dog because he views it as old, suffering, and no longer useful. He believes it would be more humane to put the dog out of its misery. Candy, on the other hand, feels a bond with the dog and is attached to it despite its condition. He wants to shoot the dog himself as a final act of kindness and loyalty.
Carlson makes the final decision to shoot Candy's old dog in "Of Mice and Men." He argues that the dog is suffering and that it would be more merciful to put it out of its misery. Candy eventually agrees to let Carlson shoot the dog.
Candy regrets not having intervened to stop the other men from wanting to shoot his dog instead of letting them do it. He also regrets not having euthanized his dog himself to prevent it from suffering a painful death at the hands of others.
Slim say's that he would want someone to shoot him if he was old and cripple like Candy's dog.
Carlson insists on shooting Candy's dog because he believes the dog is old, suffering, and no longer useful. He sees it as an act of mercy to put the dog out of its misery, and he doesn't understand Candy's emotional attachment to his companion.