Natures Grub Apple Cider Vinegar is unpasteurised and contains "mother" which is loaded with vitamins, minerals, and beneficial enzymes that can help to support the immune system of your flock. The acetic acid in Apple Cider Vinegar can help to maintain a healthy gut environment and help promote the growth of good bacteria in the digestive tract helping to support overall digestion and nutrient absorption. Regularly adding Apple Cider Vinegar to your chicken's water can actually make their intestinal tract less favourable for parasites, potentially reducing infestations of internal parasites like worms. Apple cider vinegar Unpasteurised Loaded with vitamins, minerals and beneficial enzymes Helps to support the immune system of your flock The acetic acid helps to maintain a healthy gut environment