Hello! My husband lived in a private house before meeting me and he had a…

Hello! My husband lived in a private house before meeting me and he had a dog. He loved her very much, fought with her, wrestled, ran around. All like boys with dogs. True, a month ago she died of old age and my husband was grieving for a week. And recently, he said, "I want a dog, but only when the son grows up." Who has a dog? How does a child get along with a dog? At what age is it better to start raising one? What breed? I had a maximum of turtles, and I even gave them away because they were boring.