When I first got into chickens, I believed a lot of the hype about ACV in the water and using DE for chickens. Neither one of those will treat worms, and DE can be bad for breathing—both yours and the chickens who scratch it around.
Most wormers and antibiotics are not approved for poultry, but with an appropriate egg withdrawal time, the wormers are better to use than your chicken having gut damage from worms. A 14 day withdrawal from the last dose is the usual egg withdrawal for most of the wormers listed in post 2 above. There are some studies online that you can find if you look up albendazole, fenbendazole, and piperazine, which are the generic names of Valbazen, SafeGuard, and Wazine. Valbazen is used in humans for parasites.