From the tiniest toy breeds all the way up to the giants of the canine world, all dogs need exercise and play to keep them healthy and mentally sharp. A dog that simply lies around all the time becomes dull and depressed. Dogs are active animals that need and enjoy interaction with people and other dogs. Daily walks, indoor and outdoor play, and training sessions all contribute to your dog's physical health and mental well being.

Here are some guidelines to keep in mind as you develop an exercise plan for your dog:

The amount of exercise your dog needs depends on her age, breed, and individual activity level. Your goal is to keep your dog from becoming soft and flabby. Every dog should have firm muscles and a defined waist that you can see when you look down at her from above.

Dogs of all breeds need lots of free play-running loose in an enclosed yard or chasing balls, for instance. This helps build strong muscles and bones. Puppies also need to practice walking nicely on leash so they don't pull and choke themselves.

Rambunctious pups should be prevented from jumping on and off furniture and running on hard surfaces, as both can injure their growing bones and joints.

The most active adult dogs tend to be examples of the sporting, working, terrier, and her ding breeds. Expect to give them at least thirty minutes to an hour of good, hard exercise every day. Jogging and dog sports such as agility and flyball are great ways to give these dogs the action they need.