The tapeworm dose is 10-20 mg praziquantel per kilogram, so an average 5 pound hen would need ~23 mg. Those pils contain only 4 mg praziquantel, so a five pound hen would get 6 pills (24 mg), then you repeat that in 10-14 days.
No withdrawal for Corid, but there is for the other two. I think one vet on a Facebook page said that withdrawal when using ivermectin is 28 days, and it's probably the same for praziquantel.