JR produce awesome chews, responsibly sourced from Europe and from a great variety of meat sources and cuts. Many of those are very low fat and really long lasting too. Adds fantastic variety of taste and texture to your dog's enrichment activities and some of the best we've seen for promoting chewing, licking, concentration and relaxation. Not strictly for stuffing, but they do make an excellent scoop for a portion of wet food , which you can press down into the nooks and crannies of the ear shape too. Just lamb, air dried and much less fatty than a pigs ear.