vetsense poultry avi calcium 125mlA soluble calcium supplement containing extra vitamin D3 to support eggshell integrity in layers and normal bone development in young birds. Directions for Use 4mL bird with 500mL of clean drinking water per 2kg of body weight. Use as sole source of water and prepare fresh daily. Each bird consumes between 250mL to 500mL of water per day depending on the age and weather condition.