I am a little new at chickens and wanted to work mine. I haven't seen any but don't mean they don't have them right ? So I was wondering what are the pros and cons of all the workers ? I was going to use iveamec but does it kill them all ? and also when I found it in ts it was like 64.00 am I looking at the wronge one ? Also anyone seen a single use syringe of iveamec I have seen it in other things. what other thing will this one kill ? Thanks so much for all your help.