Mixed poultry grit is the best thing you can provide to ensure the good health and wellbeing of your chickens in Lincolnshire. Choose from our wide collection of flint grid, prepared to provide steady calcium level and less bone breakage, with delivery across the Lincolnshire. John J Doe and Son ltd. ensures your chickens are healthy and produce stronger eggs with the best-quality oystershell at affordable prices in Lincolnshire.