You say it's confusing but based off the questions that you are asking you're already light years ahead of most people. First off, most of the meat at trader joes is junk even if they have some decent deals on macadamias.
"Vegetarian Fed" only means that they're not feeding the cows ground up pieces of other cows (a valid concern with anyone looking to avoid creutzfeldt-jakob /mad-cow disease). Unfortunately as a former vegetarian you can probably confirm that a diet consisting entirely of corn wheat and soy fully qualifies as "Vegetarian Fed" and in the case of these meats it's invariably what it refers to. The best label you could hope to see would be "100% grass fed" when buying ruminant meat (cow/lamb/etc), the 100% helps to avoid the misleading cases of "Grass Fed" meat that is grain finished negatively altering the nutritional quality of the meat just before slaughter. "Organic" doesn't really mean a whole lot as many food items don't contain high levels of pesticides and many farmers don't find it economical to go through all of the certification hurdles to get the official organic stamp even if their meat/veggies are 100% organic. In many cases and if you had to choose between a non-organic but 100% grass fed piece of meat or a 100% organic but grain fed meat, you should ignore the organic status and go with the grass fed one.
Ruminant meat is bound to be healthier for you in the long run as it's less likely to tip your body into a mildly inflammatory state but when you are going for poultry try to find brands that have free range chickens. Unfortunately the labeling for chickens is intentionally kept confusing and pretty meaningless from a regulatory standpoint so it won't give you much to go off of unless you use your phone to look up the farm it's coming from. Since poultry shouldn't be a huge part of your diet anyways you don't have to worry all that much about something you eat once every other month or so. Birds that truly are raised outside eating grass and bugs are quite tasty however and definitely the preferred type.
For the sausage: mix it with fresh ground/cracked caraway, fennel seed, pepper, sage leaf, some cayenne and salt.
"You can demonstrate the purpose and limits of human digestion with a simple experiment: eat a steak with some whole corn kernels, and see what comes out the other end. It won’t be the steak."