New to the color canaries: the Cobalt factor. F. Heiler. “Never heard of it” — that will be your first reaction when reading this inscription, and that is entirely justified. The term cobalt has never been used in connection with color canaries until now. This is a phenomenon that grower Fr. Heiler first described it last year in the article Breeding Canaries — Added Mutations (Bird Friends, part 2), and which he described as super oxidation in the plumage . Retrospective.
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