Elbow Dysplasia

[Nebulosa]

Originally Posted by rolf

but still I don`t see why ED 1/1 is worser than HD C(which I think is allowed to use in all countries),

The main changes are in the hereditability of the HD and ED, for you have an idea, the hereditability of HD starts in 0.2 and ends in 0.4, the hereditability of ED starts in 0.4 and ends in 1.0 (its the maximum it can arrives), depending of the breed.
We can't compare ED 1 with HD C as the dog with ED 1 already shows the degeneration, when a dog with HD C can have perfect bones with no degeneration, but only not nice norberg angles.