Hi energy no mess wild bird food. Our most popular seed mix with customers and the birds. This mix contains very high levels of sunflower hearts combined with other carefully selected ingredients to provide a nutritious meal for your garden birds with minimum waste for you. Surprisingly, the more calories the better! Garden birds use lots of energy in their daily activities. Foods rich in fats and oils will contain high calorie levels and it is these calories that provide them with the energy they need to breed, survive and thrive throughout the year. So when it comes to bird food, the higher the calories, the better for your birds!