Sorry to confuse you Patti. Tapeworms are difficult to get rid of in chickens. There's not that many wormers that will treat them. You'll see rice-like segments in feces, a sign of tapeworms. Valbazen will kill them, but requires a different protocol to get rid of them. I've dealt with tapeworms.
When there's no sign of tapeworm segments, I give my standard size birds 1/2cc orally undiluted and redose the same amount 10 days later. No problem.
Okay thanks to you both it can get a bit confusing and I've been doing this for years, finally got the safe guard down now changing to a different wormer, appreciate having experts to help us through this.And Dawg's 1/2cc dose for a standard size bird works out to ~20mg/kg, which is 0.08ml per pound. Your ducks and geese will need more than 1/2cc, but you already know that, lol.
-Kathy