Heel Yo Crack has 6 highly anti-Bacterial essential oils in it! Eucalyptus Lemon, Lemongrass, Geranium, Palmarosa, Basil and Tea Tree. This blend is good for cracks in the hoof, thrush or any condition that needs antibacterial healing. Squirt in cracks in foot 2-3 times a day to help with pain, bacteria and inflammation! You can keep crack/hole in foot clean by packing part of a cotton ball in wound/crack.