Hi Hilary,
I got this info from dawg53, BYC resident expert on deworming you could say. It's what I do now annually when the girls go into molt. I give the two different types of dewormer just because I don't want the birds to build up a resistance to one particular drug. You can, of course, only treat with Valbazen.
Large round worms are skinny and up to 3 inches long. Cecal worms are actually another type of roundworm but smaller 1/4"-2"...nasty buggars. Wazine wont kill cecal worms, only large roundworms. Valbazen kills all known worms that chickens can get. If you still have some wazine, use it. Dosage is one ounce per gallon of water. Set the wazine water out for them in the morning BEFORE you let them out, they are usually thirsty when first let out and will drink the water. Ten days later, dose them with the valbazen....that will kill any and all worms for sure. You might want to worm them semi annually afterwards.
Valbazen liquid cattle/sheep wormer. You can get it from Jefferslivestock.com or call them. They ship it pretty quick. Dosage is 1/2cc for standard size chickens and 1/4cc for smaller chickens. It is given orally...shoot it right down their throat...guaranteed worming. There's a 14 day egg withdrawal. -dawg 53
So, to sum it up, I give Wazine in their water and ten days later give them Valbazen orally. You MUST do a follow up deworming 10 days later. You can't eat the eggs during this time or for 14 days after the final treatment. I toss mine to the crows that I like to keep around as they chase the hawks away.
Hope this helps.
. If done during moult you don't even need to discard any eggs.
