It's really imperative to give the EXACT name of your location as other players cannot see your game. Christmas 2017 doesn't have a zoo per se, so I'm assuming you mean youre feeding the animals in the Kingdom Under the Sea Palace. There's no "red marks" by any of the animals in this location. You're thinking of the Zoo in 2018 Evrnt.
Nothing is happening because the 4 stone goes by the monkeys. You need to match the stone to the tile found on the clue.