When and what to worm with? Our hens free range and I haven't wormed them yet. I have heard that squash will work, but should I still get the medicine?
Welcome To BYC
If possible, take a sampling of poop to a vet for a fecal float, this will help you determine whether you need to deworm your flock or not.
If that's not possible, then deworming may be needed if you are seeing some issues or concerns within your flock.
Knowing which types of worms you are trying to treat can help you determine the correct treatment, but usually this can be broken down to 2 categories. Tapeworms and most other worms poultry can have except for Tapeworms.
To treat most worms that poultry can have
except for Tapeworm you can use Safeguard (Fenbendazole) or Valbazen (Albendazole). Both are given orally by weight; they do not mix well with water.
(Fenbendazole) - Safeguard 10% Liquid Goat Dewormer or Equine Paste dose is 0.23ml per pound of weight given orally once a day for 5 days in a row.
---OR---
(Albendazole) - Valbazen dose is 0.08ml per pound of weight given orally once, then repeated in 10 days.
To Treat Tapeworms, you want to use Praziquantel. A list of products and dosing are in This Link.
https://www.backyardchickens.com/threads/treating-tapeworms-under-construction.1220309/
Here's how to give oral medications:
https://www.backyardchickens.com/ar...dications-to-all-poultry-and-waterfowl.73335/