Quote: This post I found very rude. Effective communication is as much a form of art as it is knowing the conventions of English grammar and usage.
I sent birds to the state vet in Puyallup. The vet there specifically told me that all birds should be vaccinated.
The vaccine manufacturer recommends vaccinating at 24 hours or less. I have vaccinated chicks at all different ages and have only had one bird die from Marek's since I started vaccinating. They key is to vaccinate as early as you can and then keep the chicks isolated from the virus for at least 3 weeks so they have time to produce antibodies.