Crumbling Blocks. A source that is naturally rich in iodine and magnesium. Essential minerals are included and it acts as a natural detoxifier to prevent against infections which can be caused by bacteria. Making this a perfect accessory to be available.Naturally rich in iodine and magnesiumProvides all the essential minerals needed by pigeonsNatural detoxifier to prevent against infections caused by bacteriaFaster recovery after flightIngredients: Seashell Grit, Kaoline (Clay), Redstone, Stomach Gravel, Oyster Shell Powder, Salt, Iron Oxide, Brewers Yeast.Additive:ColourantGeneral Advice: Fresh food should be made available daily. Clean water should be made available at all times and changed at least twice a day. Good loft management and hygiene ensures your pigeons remain healthy and active. Ensure your loft is well ventilated at all times. Wash your hand thoroughly after handling birds and food. Grit and minerals should be made available at all times.Technical Specification:Product