Vaccinating chicks
Laree's posts from a month or so ago were very helpful to me (thanks again!). Check them out (use the BYC search to search this thread for Laree and Marek's or vaccine or vaccination). I'm limiting my comments here to Marek's, but it is worth investigating other diseases that can be prevented.
IMO EVERYONE SHOULD VACCINATE FOR MAREK'S. The argument that small flocks don't need to is bunk (IMO again), and I believe is only made because small flocks are replaceable and not as economically devastating to lose. But then if you do get Mareks, you will lose your lovely chickens, have to vaccinate the replacement flock, and will have helped to spread the disease, so just do it the first time. Better for everyone. If you keep an absolutely closed flock with perfect biosecurity, well maybe, but good luck with that given that chickens are addictive!
If you are getting chicks from the hatchery, have them vaccinated for Marek's, once you add up the cost of the vaccine, shipping, time, and stress (yours, mostly), it is cost-effective.
I vaccinated my new non-hatchery chicks last weekend. It was scary but fine once I got going, and the chicks screamed only at the alcohol swabbing but not the injection. Marek's is a subcutaneous injection, just under the skin. We bought vaccines from Jeffers. The 1000 dose vial comes as a wafer that can be split into quarters in the vial with an exacto knife. It also comes with the fluid needed to "revive" the virus (the diluent), which can also be divided. You mix the dry vaccine with the diluent and inject. You can get 4 mixed "batches" out of one vial and one bottle of diluent. I recommend you go to the careful effort of splitting the vaccine, it is cheaper, and the mixed vaccine is only good for about an hour, so if you panic, are too slow, or mess up, you still have some vaccine to try again. READ the directions that come with the vaccine.
Plan ahead and share a vial with someone else to save costs.
A good description of the disease and HOW TO SPLIT AND MIX the vaccine is here, just follow his directions:
http://www.firststatevetsupply.com/content/view/17/37/
A good tutorial on how to give the vaccination is here (DON'T FOLLOW THE MIXING DIRECTIONS IF YOU ARE SPLITTING THE VACCINE)
http://poultryone.com/articles/mareks.html
A good summary of why and when to vaccinate can be found here:
http://edis.ifas.ufl.edu/ps030