I was reading something similar to this in one of my back issues of Garden Gate Magazine one night this week, but I quickly read it and I took that it was using powdered baby formula..and thinking to myself..that's more expensive than buying Liquid Fence but my reading comprehension isn't the greatest..I'll find the article again and report back here. I think the article said you didn't have to respray it after a rain, where most other products you do. Maybe the article meant regular powdered milk..