I've just come across this blog post on Poultrykeeper by Zoe Brodie-James (dorsetduckowner and moderator on here) about the horrors involved in most of the production of down for duvets and for the coats and gilets which are so fashionable nowadays. Do have a read -I bought a winter coat last year, I'm so glad I chose Primaloft!
https://poultrykeeper.com/blog/duck-goose-down-production/
https://poultrykeeper.com/blog/duck-goose-down-production/