Fatty liver heammoragic syndrome

This postmortem clip from a poultry carcass from a farm.The birds are 30 weeks old.They have just reached 85% production and suddenly started laying unusually small eggs and then mortality started.Diet is of moderate calories,500kg maize and Brewers dry grain .feed quantity came up to 125gms per day. No fat deposition in the abdomen.The heammorages in the liver is very consistent in all carcass..choline is included in ration and methionine at 2.5 kg per ton.Soya in diet is 200kg per ton. Production crashed