Mr.Universe
Chirping
if they will eat it straight up crush or mince it and mix it with food. offer no foods at night and offer foods with the garlic first thing and wait till they have eaten it for 2 hours before giving non garlic food to ensure atleast some garlic has been consumed, otherwise you could heat chopped cloves in water and simmer for 30 minutes and strain and just offer garlic enfused water instead of food


Many thanks to everyone who gave advice, but I am ashamed to say that I have figured the probable cause of this sickness whereby the food is not digesting, and their breastbones are just covered with skin.............I had used some old window screens to separate them away from the door so I could get to another flock of chickens and they started pecking on the screens. When I finished with the other flock the screens had large holes in them! They were EATING screen wire. No wonder their food hasn't digested! So far, I've actually lost only 2, but most of the others are still sick. I hope I don't lose all. Oh, well, a costly lesson learned! Never use screen wire where chickens have access to it!!
Hope you can treat them all successfully 