The Campine and Sebright share a studied feathering mechanism

A 1990 inheritance study investigated Golden Campine hen-feathering using breeding crosses and skin aromatase measurements. As in Sebrights, males' female-type feather morphology was associated with increased conversion of androgen to estrogen in peripheral tissues. Offspring carrying one copy showed approximately half the increased enzyme activity of the homozygous Campine stock.

Crosses between Campine and Sebright stock provided evidence that their hen-feathering factors were allelic: different versions or occurrences at the same genetic locus rather than wholly unrelated mechanisms. The authors also found matching DNA restriction patterns and suggested a possible Sebright origin for the Campine factor. That last statement is a research interpretation, not a complete pedigree for every modern Campine. The work explains one inherited feathering feature; it does not make the breeds interchangeable or establish identical production and behavior.