Please remember a dog is nothing like a kid. I have 6 dogs, they are my babies, I adore and love them and my husband and I call them our kids. But they are NOT kids which is why we enjoy them so much. One of my dreams is to be able to stop working and stay home wiht my dogs. Interstingly if I had human kids Id never be able to afford to stay home with them and give them the quality of life I think human kids should have.
I also think there are people who dont want their own kids who have strong nurturing insticts. I do. I love animals and I teach chilren with severe disabilities. So I do have a nurturing side, but I dont want my own kids.
I once knew a women, a vetrinaria, who when her dog died decided to have a baby. She wound up regretting her decision somewhat. Of course she adored her daughter but her life was not what she had wanted.