Net-Tex Poultry Egg and Shell Support (Formaly known as Net-Tex Mineral Boost). Nutritional supplement for laying hens, contains high levels of limestone and oyster grit to assist digestion, support immune function, gut health, shell quality and yolk colour. Also contains seaweed, calcium, probiotics and aniseed. In periods of stress, feed daily for a week For maintenance, add to feed twice a week to support optimum health.