Use the grease as suet and mix in little pieces

4 1/2 cups ground fresh suet
3/4 cup dried and fine ground bakery goods
(whole-wheat or cracked-wheat bread or crackers are best)
1/2 cup shelled sunflower seeds
1/4 cup millet
1/4 cup dried and chopped fruit (currants, raisins, or berries)
3/4 cup dried and fine ground meat (optional)
Melt suet in a saucepan over low heat.
Mix the rest of the ingredients together in a large bowl.
Allow the suet to cool until slightly thickened, then stir it into the mixture in the bowl. Mix thoroughly.
Pour or pack into forms or suet feeders; smear onto tree trunks or overhanging limbs and branches; or pack into pine cones.