my dd just obtained 3 black cochin chicks, 13-14 wks old which we've kept seperate from our flock. this a.m. i found a long (about 4") flat whiteish noodley thing which i am assuming is a worm laying dead. now my question is, is there a safe wormer for them at this age? i am assuming they all have them since they were together and need to be treated together. the previous owner didn't mention anything about worming their older flock etc and my dd got these at her 4H mtg. she is away on a youth service project this wknd w/church and i'd like to start taking care of this before she gets back. can i use wazine? ivermectin? any suggestions?