Their bodies grow fast, but their hearts and minds take their time—here’s why some large dogs need extra patience, training, ...

If you're looking for a big dog, you might want to consider a neapolitan mastiff or an American molossus. These are two of the largest dog breeds out there and they have some significant differences.

Veterinarians say these dog breeds are naturally calm, relaxed, and easygoing—perfect for peaceful homes.