The German Shepherd that’s naturally a watchdog won’t be the cuddly playmate for your small children. The greyhound, particularly the rescued greyhound, is gentle and quiet, but they must have plenty of outdoor time to run. As a dog that can gain speeds of up to 45 mph, the greyhound is not a dog for couch potatoes.

If you want a medium to large dog that will be easily trained and protective over your children, then choose a pastoral or herding dog like the German Shepherd Dog, Collie or Welsh Corgi. The instincts they have for keeping sheep in the pasture adapt to keeping your children inside the backyard while keeping intruders outside.

The hunting breed has a proud tradition as the faithful companion and partner to hunters. These dogs include the Golden Retriever, Labrador Retriever, English Springer Spaniel, English Setter, Irish Setter and Cocker Spaniel. Even if you don’t hunt, give these dogs the kind of open field exercise that makes them feel useful in the way that’s part of their heritage.

Some breeds require space, while others need primping for show that rivals what you see among fashion models. Perhaps the easiest breed to bring home and love is the “pound mutt.” In all shapes and sizes, these dogs have endured hardships that landed them in the shelter, when all they want is a family to love. Bring one home and you’ll have a friend for life.