... chicken digest 2. Improve gastric motility 3. Improve feed operating factor4. ISO90015. Improve trace element ProductsBearing Steel GritChemical ... ,glandular stomach smaller ,especially developed digestive glands .Feed proventriculus immersed sticky digestive juice and soon into the ... report say , gizzard steel grit , the digestibility of feed pellets can be increase by 10% ,increase the digestibility ...