private void EatPreysAt(ICell<Coordinates2D, EmptyData, EmptyData> target)
{
double preyWeight = 0;
foreach(PreyAnt preyAnt in target.OfType<PreyAnt>()) {
preyWeight += preyAnt.Weight;
this.Kill(preyAnt);
}
Weight = (int) Math.Min(6, preyWeight * MassPrey + Weight);
this.MoveTo(target.Coordinate);
}