This mix can be either lamb tripe or ox tripe or both, depending on stock, with minced oily fish 80% either makerel, sardines, sprats or salmon  tripe 20% fish approx 2% bone.
This mixture was devised to appeal to dogs who find whole fish unpalatable as oily fish is an important part of your animals diet.
Typical analysis 100g
Water 68.25,  Protein 14.52,  Fat 14.22,  Ash 1,  Fibre 1.2