The passionate animal advocate has written to Miuccia Prada asking her to remove the fabric from all future collections, rather than slowly reduce it, as the company has said it will do.
'Drop fur immediately'
"I have long admired your creativity - and Prada's timeless nylon bag - but I was disappointed to learn that instead of going fur-free, Prada has chosen merely to reduce the amount of animal pelts that it sells," Anderson wrote.
"'Humane fur' is like 'merciful murder': it doesn't exist. Even in countries that participate in the fur industry's Origin Assured program - which claims that animals are treated “humanely” before they’re slaughtered - investigations by PETA and other animal-protection groups have repeatedly shown that cruelty is rampant.
"A 'gradual' reduction is no consolation to animals who are languishing inside tiny cages on fur farms and being anally electrocuted and skinned alive for their fur right now. Please, I urge you to drop fur immediately."
Fur no more
Prada is one of the few leading design houses which has not yet pledged to ditch fur: in recent times numerous designers have dropped the fabric, including Burberry, Armani, Versace, and Gucci among others.
Notably, earlier this year, Donatella Versace announced she will no longer use fur in her designs. The designer made the comments in an interview with The Economist's 1843 magazine.
She said: "Fur? I am out of that. I don’t want to kill animals to make fashion. It doesn’t feel right."