Great advice.... just wormed them yesterday.... would it be ok to follow up in 10 days with Avitrol or Big L? And would it be ok to worm Molly while she is recovering?Piperazine only treats for round worm and you have to treat twice , 10 days apart in order to kill any hatching larvae. Chickens are susceptible to several species of internal parasites so I use a levamisole product. Big L wormer contains levamisole and it has 2 x treatment dosages. The weaker dose only treats round worm, but the stronger dose treats for more. Avitrol plus is another wormer used by many breeders.