Not sure where you are, but 99.9% of the hogs that I've dressed out here in Southwestern Oklahoma are very lean.
To make sausage, you have to add fat.
The hogs here are like deer. No fat. The meat cooks up very dry unless you really dress it up.
Young pigs, 20 to 30 pounds on the hoof that haven't gotten 100k miles on them and developed long, hard muscle tissue are pretty good. They dress out between 10 and 15 pounds.
I've taken a few, skinned out, fit in my smoker whole.
Those eat very well!
Those big bruisers? Let 'em rot!