Sweet PDZ Powder Horse Stall RefresherSweet PDZ Horse Stall Refresher POWDER Classic powder PDZ, introduced in 1983, has a small granule size that is easy to spread on problem areas, and absorbs ammonia quickly and comprehensively. Sweet PDZ Horse Stall Refresher Powder is ideal for discrete or more challenging problem areas in the stall. PDZ stall powder Power form Easy to spread on problem areas Absorbs ammonia quickly to minimize smell and negative effects Available in 40 lb. bag