Harringtons Grain Free Salmon & Sweet Potato Dog Food. Grain free formula with Salmon as the first ingredient, made with a blend of white and sweet potatoes. Contains a blend of FOS and MOS which work together to help support a healthy digestive system, with green lipped mussel to support healthy joints. Contains spirulina and linseed rich in omega 3 oils, with added botanical herbs and fruits including oregano, parsley, pomegranate, cranberry and rosehip.