Cows are not just killed to make handbags. Cattle are killed for beef and a large number of other uses besides making handbags.
They are killed to make most leather because it is more economical and acceptable than killing mice or dolphins or cats or llamas or people or any other species.
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Kill cows. They will drop leather and you can make leather armour.
Capezio makes handbags
Chic makes handbags
Coach makes handbags
Esprit makes handbags
Gitano makes handbags
They will kill only the young calves, but never the adult cows.
Jaclyn Inc. makes handbags
Chaus Accessories makes handbags
Dooney and Bourke makes handbags
JLN Inc. makes handbags