Place lard and peanut butter in a large bowl. Microwave on high for 1-2 minutes until melted and smooth.

Stir in cornmeal, oatmeal, flour and birdseed. Mix well.

Line a mold with plastic wrap, leaving a generous amount of extra wrap outside the mold on the sides. Add suet to the mold and press in firmly. Once the mold is full, fold the extra plastic wrap over to enclose the entire cake. Remove from the mold and repeat with the remaining suet.

Place the cakes in the freezer to completely set and keep until needed.