May 27, 2008 - There is no such thing as having a plant that is doggie proof from getting damaged.  However, there are ways that you can have a nice garden and preventing it from getting messed up by your dog.

One way is to have a sturdy wire fence put up that surrounds your garden, this may prevent small dogs from getting mischievous in the garden, but that may take away from the lovely appearance of your garden.  Another option may be to have a picket fence setup to surround your garden and burying the fence deep into the soil with perhaps rocks at the base to prevent dogs from digging below the fence.

Create "mulched or grassy paths" between the flowers and plants.  Dogs like to follow paths to take care of their business and will most likely follow the path you create that leads then away from your garden.

It is also your responsibility as a dog owner to understand what plants and flowers may be harmful to your dog such as: yew, wild black cherry, azalea, rhododendron, hydrangea, nandina, oleander, English ivy, daffodil, tulip, lily of the valley, foxglove, hyacinth, rhubarb and castor bean. 

When leaving your dog outside, do not tie your dog to the tree, because it may lead your dog to develop aggressive behavior.  If your dog is left outdoors for too long, it may begin to start digging, so make sure to not keep your dog out for extended periods of time.  Finally, make sure your dog has soft grass or shaded soil to lie on to keep it comfortable outside. 

Source: "Fido versus flora", Joel M. Lerner - Canada.com