Store bought suet cakes can be full of unnecessary ingredients, usually seeds, that are not eaten by the types of birds who eat suet. If you know which types of birds in your area will dine on suet, you can create your own suet cakes that are packed full of what those birds like.
It's easy and fairly cheap to make your own suet and freeze up the cakes until they are needed. It's a nutritional, protein packed winter meal to help our feathered friends through the tough days of ice and snowstorms.
If you like to feed birds year round, I also have advice for feeding suet during the hot summer months.