ImmunityHorses require lots of different supplements throughout the year. Some horses suffer from sweet itch, which can be a terrible rtime for horse owner and horse alike. We use and highly recommend NAF Dtox and D itch. D tox cleanses the horses system, so can be used for all ailments. D itch really helps to remove that itchy feeling from the inside out. After speaking to several scientists and vets, they highly recommend that you treat the problem from both the inside and the outside. Its better if you can plan ahead and resolve the problem from the inside before it has to much of an effect.