Valbazen does work systemically, so it will require a withdrawal period.Ugh, great thread. I have been kicking myself about taking the time to worm my hens as they are overdue for regular treatment, and their egg production has been rather poor for months. Perhaps now is the time. I use Ivermectin for aggressive lice/mite infestations and Valbazen for worms. It's just SO much work.
By the way, my understanding is that Valbazen does not require egg withdrawal as it's not systemic like Ivermectin?
~Elaine
For mammals:
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-Kathy