Mr. Wheaton, my problem is in my barn. I bought 10 acres with an old tractor shed which I have turned into my barn. I kept my son-in-laws dog in a large dog kennel. It was not a day and I noticed the dog scratching. I immediately thought ticks, since the area is kind of wooded. As I checked the dog, I could see the fleas just jumping around. My question is does the DE work for outside flea infestations also or is there something else I should do. I am sure my rooster and hens probably have the same problem. My rabbits so far have been spared. Look forward to your answer. Love your podcasts, articles and discussion forums. Wish I had visited the permies.com sooner. Thanks.