I have been posting over the last couple of months about 4 chickens my mom got me for xmas. It was from a reputable breeder/NPIP, the works. I know they had mites and long story short they all died or had to be culled. Today I woke up to find a prized silkie acting funny. I think maybe eggbound but I am not sure. I started checking her out and found little crawling bugs around her vent. I am so upset as this has been a sting of bad events and now I feel terrible. I treated with Ivermectin (where I bought her did the same that's why I did it) I know ivermectin is controversial on here but it is all I had this morning. I also dusted around the vent with a lice poultry duster. Is mites/lice fairly common? What is the best way to treat 100 birds? I started grabbing everyone I could catch and the older hens seem to have it but I do not see it on the younger ones. I have chickens ranging from 1 week-2 years. How should I treat the coops? This silkie that is off today may be egg bound and I have posted about that as well. My 5 year old nephew loves that chicken and I will feel even worse if something happens to her. I plan to sell chicks and eggs from these chickens but now that's on hold. Please help a very frustrated chicken mom?! Also should I worm? I have some wazine but have never used it.