Depends on the severity. Breeding normally on a perch requires some balance. But I WOULDNT breed splay legged birds, first of all because of the chance that it was caused genetically and second because you don't know how the pelvic bones of the hen may have been been effected and even if she does t get eggbound and die the first time, internal damage may be done over time that isn't detected until it kills her, not to mention the pain she may be in without you knowing. Thirdly, the splay legs may prevent proper brooding and cause issues with the babies.
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