I have approximately forty barnyard chickens. They are all roughly 9 months to two years old and have never been wormed. Recently we have had a HUGE drop in egg production. I went from nearly two dozen eggs a day down to just getting 8. Four days ago one of my lakenvelder hens had a messy bottom when I opened the coop and right underneath her was a load of poop that had worms crawling in it. AHA!! Wormy chickens will cause egg production drops! DUH!! Now, I have always tried to go the natural route with my chickens. It became clear to me that I had a big problem and it was time to break out the big guns. My diatomaceous earth/garlic/cayenne mixture had failed me. It's ok. I'm over it. SO, I went and bought a bottle of Wazine 17. Today they all got wazine in the water. I have a bottle of Valbazen coming tomorrow in the mail. I have read tons of threads on worming and I think I have this right. Wazine today. Ten days from now Valbazen. .5cc for large fowl .25 cc for bantams My question is, do I really need to wait ten days after using Wazine to give the Valbazen? Will it hurt them to just do it on Friday when my husband will be here to help me do it? Do I need to repeat the Valbazen ten days after the inital Valbazen dose to get the new parasites that have hatched? If I wait ten days that is literally over thirty days I will be tossing eggs. I really didn't want to do that. Will Valbazen treat Gapeworm as well? I have one hen who seems to gasp a lot with her mouth open. Thanks so much!!