WORMING POULTRY 1st - Mix 1oz of Copper Sulfate to 1 gal of water to make concentrate-mix 24oz of concentrate to 5 gal of drinking water. -Treat layers for 3 day then off for 3 days. Re-treat as necessary. 2nd -Mix 1part D.E. (Diatomaceous Earth) + 1 part Fresh ground Garlic + 1 part Cheyenne Powder or fresh ground. Top dress feed troughs with mixture to layer feed 2 consecutive days per week for 3 weeks. This will take care of the problems with no withholding period.