I have heard of Cayenne pepper for worming. Mys sister uses it to keep squirrels away. Squirrels evidently don't like Cayenne.
I use Oats to improve egg laying. Try giving them some oatmeal flakes. Make sure they are getting a lot of water. My 17 Hens are going thru at least 2 gals of water a day, with the heat. When Hot and Dry (not real humid) make it 3 gallons.
Egg making takes a lot of water. If they are not getting enough, they will stop laying. Unfortunately my girls never stopped laying this year for their molt. I wish they would have, they need the rest. Now I have to watch their health.