The bacon grease is probably going to be a little runny for the suet to stick together. The lard rehardens as well as the peanut butter does also and that is what holds the suet together. If it turned out crumbly then you need to add more lard or peanut butter. What makes making it yourself cheaper is using what you have or can find cheap...oats, oatmeal, left over cereal, etc. It's a great time to hit bent & dent stores or the clearence isle where stuff is running out of date. You can also add fruit such as raisins.