There's also some called "Livestock Lice Powder". As Imp pointed out, read the active ingredient.
What are you treating for? If you're treating for lice, be sure to also buy a permethrin spray if you can. That can be "Goat Lice Spray" (read the label - it's less than 10% permethrin), or "10% Permethrin spray". For mites, you have to treat the wood of the coops up to 3 feet on the walls, and then cracks, eyes, joints in the wood. That's where mites live and lay their eggs. You'd treat the birds with the permethrin (not PYrethrin) dust.
On the bedding, scrape it aside and dust the ground. replace the bedding. Then sprinkle the bedding with the dust and stir in. Do so in the nest boxes as well. Buy at least 2 cans. It's cheap but you don't want to run out.
If you can't find the liquid permethrin, buy could buy another can and make a 'paint' out of the dust by mixing it with water or with mineral oil. Make it thin and use that to paint the wood.
Redust birds in 7 days and again in 7 days until you see no more signs of parasites.