Different species, and different parasites, use vastly different dosages per pound body weight.
Also, in the USA, Ivermectin is not approved for use on poultry, because it will be in the hen's eggs for a varying length of time, and in the meat for a while also. So, totally off label use if you go ahead with it.
Permethrin spray or dust works fine against mites (spray is easier!) or spinosad also is effective, and both are fine on poultry, with no egg withdrawal.
And fenbendazole gets most intestinal worms, corid works against coccidia, and praziquantil , not approved for poultry, kills tapeworms.
It's complicated! Chickens are a food animal, and different rules apply, not the same as pet species.
Mary
Also, in the USA, Ivermectin is not approved for use on poultry, because it will be in the hen's eggs for a varying length of time, and in the meat for a while also. So, totally off label use if you go ahead with it.
Permethrin spray or dust works fine against mites (spray is easier!) or spinosad also is effective, and both are fine on poultry, with no egg withdrawal.
And fenbendazole gets most intestinal worms, corid works against coccidia, and praziquantil , not approved for poultry, kills tapeworms.
It's complicated! Chickens are a food animal, and different rules apply, not the same as pet species.
Mary