The proper performance has to conform to quite specific regulations. The most important criteria in this respect are:
- await the exact moment of moulting (moulting = the natural process of shedding and regrowing of the plumage)
- the plumage must not be removed completely, but only be “thinned out”.
Quelle
Verband der Deutschen Daunen- und Federnindustrie e.V.
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