将给定的简短英语文章进行翻译成中文。
English article: 
The dog is one of the most popular pets in the world. They are friendly, loyal, and protective of their owners. Many people own dogs as companions, and some even use them as service animals to help with disabilities.
中文翻译：
狗是世界上最受欢迎的宠物之一。它们友好、忠诚，对主人具有保护性。许多人拥有狗作为伴侣，有些人甚至使用它们作为服务动物来帮助残障人士。