Boral Functional Limited Ingredients Duck Diet is a grain free food using duck (from Canada) as a single meat protein. This LID diet is hypoallergenic, designed to help sensitive stomachs, and is great for skin and coat troubles. Boral LID helps avoid sensitivities issues with easy digestion, having 1 meat protein, zero chicken, and using ingredients like tapioca and coconut oil (both known to help with sensitivities). Boral Dog Foods use ProPath. The organic zinc in ProPath, is easily absorbed and is more effective at healing skin, helping hot spots and reducing gut inflammation.