How do i vaccinate my own chicks for marks?

[chicken delighted]

i am in the process of raising my own chicks from my flock for egg and meat.i sell alot of eggs and my customer list is expanding . things are going great and my broody hens are keeping me very buzy i just want to keep everyone healthy and would like to vaccinate my own birds has any done this and where can i get information on what i need to do this.
i know it is done at 1 day .can it be done later.
also what is the youngest age you should worm your birds?

please any inorfmatin would be very helpful

 

[Judy]

A good writeup on vaccination:

http://edis.ifas.ufl.edu/ps030

I don't know the answer on worming. I've never done it before one year.

 

[chicken delighted]

thank you!
flockwatcher for the infromation