Dog food (Wantage OX12)

Purina Pro Plan dry dog food for large breeds. 14kg bag. It was sent by mistake. I opened and used as treats but my dog now on special diet. It’s almost full.
 I’d hate to throw it away but dog rehoming centres won’t accept donations if bag is open. Hope someone can use it up.
UPDATE: also have 3 sealed trays of Burns wet food turkey and rice 395g each

Fair Chance Policy: I’ll wait before choosing a recipient to give more people a chance to reply.