DJD generally means arthritis.
If a dog has HD or ED....over time the joint will show wear and tear - or osteoarthritis.
However, if a dog doesn't have HD or ED ... over time the joints will show wear and tear - or osteoarthritis.
The difference is usually in the amount of wear and tear, and the age it appears.
Pups with HD will sometimes start showing arthritis in the hip affected before it reaches a year of age.
And that's due to the malformation of the joint, causing excessive and early wear and tear.
Usually, you wouldn't see that for many years, unless there's been an injury, or the dog is putting stress on the joints from some activity.
[ 10-12-2007, 11:28 PM: Message edited by: Ardeagold ]