I have 7 chickens between 4 mos and 8 1/2 yrs. I have never wormed them and had just been using DE, until finding a long worm in a poo. Sunday night I took away their water. Monday morning I gave them 1 oz Wazine in 1 gal water. I also gave them their crumbles mixed with water (I do that every morning) and yogurt and later just the crumbles.That was the only water that they had until bedtime that night when I took it away and put fresh water out on Tuesday morning. Tuesday I gave them crumbles with yogurt and applesauce. As of today (Wed) I haven't seen any worms. All over their yard I did notice what looks like the casing from around a new feather that has been preened. When should I start to see worms? Could the Wazine have been too old? If they have never been wormed shouldn't there be worms? When should I worm them again? Should I use new Wazine then fenbendazole in 2 weeks or just wait the 2 weeks and use fenbendazole?