Hi enola, I have some information for you. If you can get Maldison wash or Malaban Wash, this will do the chooks and the coops.
Maldison - use 0.5% in 1L to swab chooks. Use a sponge but don't spray the chook. Repeat 7 to 10 days if necessary.
- use 3% in 1L to spray the coop and run. Chooks must be well out of the way.
Malaban - use the same as Maldison. Malaban is the name of it here in Aus.
These products are poison so you must wear protective gloves, cover nose and mouth and wear protective eye glasses.
Active constituent ; 200 g/L Maldison (an anticholineserase compound) Solvent; 633 g/L Xylene
Just follow the intstructions on the container. You can also use this on cats and dogs. Use it as a preventative if you wish.