This might sound goofy to some people but I swear by it... our handful of pigs the 2013 season (get in the Spring and butcher in late Fall ... Late late October... ( a couple were sold at Fair) the quality of our meat is super... our pigs have space to move... over 1/2 acre for the four them... movement builds muscle and burns fat obviously so leaner too. We feed regular pig food supplemented with leftovers and plants that are "done for the season" - corn stalks, brocolli tall stems, a haphazard cabbage, tomatoes, potatoes, peppers, squash, and more... and dog food... yes dog food... to add protein ... (Note: this manufacturer of both of these foods does not use ethoxyquin as a fat preservative --as found in many products for livestock -- scary stuff banned by FDA for numerous reasons and yet is in livestock milk replacer for babies and used as fat preservative in many other feed)... anyway dog food is good safe way to bump protein as a supplement. Also NOTE: In the Diamond food Chicory Root is a natural prebiotic and contains probiotic and KSND has probiotic for digestive and nutrition absorption health. And both have L-carnitine for leanness. We mix the Salmon food and the Diamond Naturals. At Costco Kirklands signature natures domain Salmon and sweet potato... no corn no soy no wheat and loads of fish protein and fish meal -- overall 24% Protein INGREDIENTS Salmon meal, sweet potatoes, peas, potatoes, canola oil, ocean fish meal, potato fiber, pea protein, natural flavor, flaxseed, salt, choline chloride, dried chicory root, tomatoes, blueberries, raspberries, yucca schidigera extract, dried Enterococcus faecium fermentation product, dried Lactobacillus acidophilus fermentation product, dried Lactobacillus casei fermentation product, dried Lactobacillus plantarum fermentation product, dried Trichoderma longibrachiatum fermentation extract, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, copper sulfate, potassium iodide, thiamine mononitrate (vitamin B1), manganese proteinate, manganous oxide, ascorbic acid, vitamin A supplement, biotin, niacin, calcium pantothenate, manganese sulfate, sodium selenite, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, riboflavin (vitamin B2), vitamin D supplement, folic acid. It is a bit less than $1 a pound at 32.99 for 35#. Diamond Naturals Large Breed Puppy -- overall 27% protein... Ingredients Lamb, lamb meal, ground rice, cracked pearled barley, oatmeal, peas, chicken fat (preserved with mixed tocopherols), egg product, tomato pomace, potato protein, potatoes, natural flavor, flaxseed, ocean fish meal, salmon oil (source of DHA), salt, potassium chloride, choline chloride, dried chicory root, dried kelp, carrots, apples, tomatoes, blueberries, spinach, dried skim milk, cranberries, rosemary extract, parsley flake, yucca schidigera extract, L-Carnitine, dried Enterococcus faecium fermentation product, dried Lactobacillus acidophilus fermentation product, dried Lactobacillus casei fermentation product, dried Lactobacillus plantarum fermentation product, dried Trichoderma longibrachiatum fermentation extract, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, copper sulfate, potassium iodide, thiamine mononitrate, manganese proteinate, manganous oxide, ascorbic acid, vitamin A supplement, biotin, niacin, calcium pantothenate, manganese sulfate, sodium selenite, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, riboflavin, vitamin D supplement, folic acid. (or Diamond Naturals Adult Chicken and Rice very close) Both Diamond products about $30 for 40#. Cheaper than human grade lentils... we can't always find lower grade (cheaper) lentils for feeding pigs.
So this may not work for people who are feeding loads of pigs for profit but for those that are raising for personal consumption and want to supplement for great quality pork that doesn't have scary ingredients... it works.