Ivermectin is good for 30 days worm prevention in dogs, then ongoing monthly doses are required. I know, apples and oranges comparing mammals with birds. But Ivermectin does stay in the birds system for a long period. I'm not sure about praziquantel. I usually toss eggs for 14 days after using z-gold or equimax.
I agree with Casportpony, 8 weeks should be enough.
I agree with Casportpony, 8 weeks should be enough.