Old gardener I think I know exactly what your pig problem was. Your pigs got long noses and scraggly hairs as well. The protein level of the feed must be age/size appropriate to the pigs. Too little protein and there are some physical changes to the hog and the meat. My father in law and his dad raised hogs every year. Pigs start at 20% as piglets and you lower the protein levels as they get older. One of our pigs is on 12% and about 300 lb right now.