I have a mated pair of mallards that have been together for 2 years. I rescued them as 2 month olds from a person who bred them to train hunting dogs. The female has disappeared and must have slipped out the gate when I fed them earlier. It is bitterly cold here. All lakes frozen. Do you think she may come back to see her mate or is she gone? Any chance she will survive? Her mate is now alone with just chickens across the way to look at and very fretful.