If we compare it with dogs and fish at the pet level, then conscience is basically incomparable, because their living environment and habits are completely different. Shopping lives on land, but you can only live in water. If you let a fish out of water, I think it will die in half an hour. Dogs, even if they leave their owners, will look for their owners.
Maybe you have seen some news. When a bride gets married, the dog follows the bride's wedding car closely and runs after it, never wanting to leave its owner again. The dog's loyalty really touched us. Dogs are close to human beings and are their friends. Don't kill the dog.