Question on Sevin (Chickens are Fed up with being fed on)

Can someone please post a link to the Sevin that I can use on my chickens. I don't want to use just any Sevin I worry that it won't be safe. I figure this is the best place on here to ask this question. I am pretty sure that my flock has either mites or lice so I need to treat the problem. Also I have 6 one week old chicks that I am also thinking have lice. Would sevin be safe to use on them or can I use something else. I am able to bathe them with a green tea shampoo if this would work and be safer. I will also be buying ivermectin and DE (food grade) this weekend to help prevent any other problems in the future) Plus I hear conflicting things about cedar bedding one says it is fine to use another says use in small quantities. I only have access to pine right now but am looking to get cedar in the future to help control the bugs. Please tell me what you think on any of this.