Our grocery store sells hog caseings packed in salt. There are a lot of hunters here that make venison sausage. I made bear breakfast link sausage a few years ago with sheep caseings I ordered online, they are skinnier. My favorite is venison Landjagers, I smoke them and then you hang them a couple weeks to dry, about like peperoni. I use 20% pork fat, 80% venison. Some stores sell pork fat for almost the same price as meat, I call ahead at a smaller one and ask for them to save some, 10lbs or so, .29 cents a lb. They throw it away otherwise.