Subliminal dominance - shy Wolfdogs

[mariagroot]

This Leonberger is one of the puppies bred by this person and she is the
only one shy dog in this litter.

I heard of cwd litters also all good, but one shy. What do you think should
a breeder do with such a puppy? Should you cull/euthanize such a puppy or
keep it yourself? I don't think it should be sold, because it is bad for
the breed and the new owner will face problems that he cannot help.
What do you think,
thanks
Maria