I been using it for years, but as with every product out there you must be careful how is used, applied and ingested. Read all instructions and follow them carefully. that is what I been doing and so far so good..
I found that parting my dogs hair down her back and applying a small ammount of the powder and brushing it towards the tail , then put a light shirt on for a day or so works wonderful and the powder does not wound up flying every where. For the bedding I try to put it in the seams of the bed and then cover it with their blanket, after a day or so it seems to sink in the fabric. When is applied to my yard my hubby wears a breathing mask, and he dust very close to the floor to prevent a cloud.. with more powder applied at the edge of the fence where the woods are. also around and under the shed.
HTH,
Carmen in nj