I would like to plant some azalea bushes in my yard. In order to do so I need to put some special fertilzer in the soil to make it acidic. ITs a powder you mix into the soil when you plant. Is this ok for chickens to peck in? its says to keep away from kids/pets. I suppose you could put the fertilizer down in the hole and not on top where they scratch around. ANybody done this?? THanks Rene'