Well, if she was mine I would notch her lambs ear at birth (a permanaent and unmissable mark) and would then be sure not to keep her as a breeding replacement. In all fairness she should go to the butcher. Having said that it really depends on how tough you are in selecting your replacements -if your sheep are pets, you might give any ewe lamb the benefit of the doubt.
we have selected hard for easy lambing so any ewes that have a difficult lambing go - and so do their daughters. Breeding problems tend to be hereditary