This is a definite newbie question so bear with me I have 17 chicks on order with My Pet Chicken... 11 are due here the week of July 19th and the other 6 are due later in August. Anyway, when I ordered it had an option of to have them vaccinated or not and I chose "yes" for a dollar more per chick. I simply went with "yes" because I figure it's something good for the chicks and a good idea to have done. However, I feel like an idiot because I have no idea what the vaccine is or what it is for. I dont question that it was the right decision; I'm just wondering what the vaccine is and what it protects them from. I'm sure most of you probably know right away the answer to this and I look forward to your replies. Thanks.