Merrick 5oz. Lamb Canine Training Treats Pouch If a treat could be compared to popcorn, this would be it. These bite size cubes are great for all sizes and ages of dogs. Their softer texture makes it easier for dogs both young and old to dine on this one of a kind delicacy. Lamb lung is the sole ingredient for this product which is a natural source of high protein and a great treat for dogs on a lamb diet. This treat is packaged in a resealable pouch to help keep these treats fresh. Ingredients: Lamb Lung.