I took my dog to the vet today after notices a few symptoms and sure enough, she has whipworms again. We just went through this last year, and she's on heartworm/other worm preventative but it's not 100%, clearly. She shares a 50x50 kennel with 2 other dogs, who we are also going to treat. Since the eggs stay in the ground for 5 years, we were trying to figure out a way to treat the area as we can't just move the kennel. The vet mentioned burning the ground, which we are looking into. And we may just scoop about 6 inches of topsoil out and put in 3 inches of bankrun gravel. Are there any sprays (would Seven work? for bugs and other things on plants) or any other treatments that we haven't come across that have proven effective? TIA.