Mink carrying pray item probably a Water Vole. Mink are highly polymorphic in terms of coat colour (this is one reason why they were so useful as fur animals, because it was easy for breeders to produce a wide range of colours by selecting for the recessive coat colours in their breeding programmes), There was a pure white mink (not albino) bred in captivity that created all sort of challenges for breeders because that fur colour was genetically linked to deafness, so the mother mink never reacted when their babies were squeaking in distress!