Giant unused duvet (for pet use) (Emerson Valley MK4)

It came inside a brand new dog bed I bought on line but it was too thick and over stuffed and when I un zipped the inside I found 2 duvet so I kept the thinner smaller duvet and left with an absolute monster big unused duvet, one end was not stitched so I took out the fibre that was falling out. Not sure of the size but its huge and quite thick. Will be such a shame to throw out as its clean and not used