I posted earlier about my dog and her itchy skin condition and constant digging. I have used the Diatomaceous Earth externally on her and it was INSTANT relief for her. I couldn't believe it! I have only used it once and it has only been two days, so I can't comment on long term. In the short term I would highly recommend it. I also ordered the food grade Diatomaceous Earth and have added it to their water and sprinkled it on their food. Of course I have no effect to post on that yet but I will. I am planning on taking the food grade for myself as well, but I still have a bit more reading to do before I start. I will keep you posted on that as well.