Mixing vaccinated with non vaccinated flock?

[Ozkan]

Hi
I’ve seen a very beautiful showgirl for sale but she’s been vaccinated against many diseases such as mycoplasma ,Newcastle etc. I’ve got not vaccinated silkies is it bad if I mix a vaccinated bird with my non-vaccinated flock? Thanks

 

[Eggcessive]

It may depend on what type vaccines are used, so getting a thorough list of the vaccines they received, and if they were live, attenuated, or dead vaccines. You may need to look up each vaccine and read whether it was live or not. I have both Mareks vaccinated and non-vaccinated chickens together for years, and have never had a problem. Here is some reading about the different types of vaccines and mixing chickens:
http://www.poultryhub.org/health/health-management/vaccination/

Here is a label for Newcastles/Bronchitis vaccine to read:
https://valleyvet.cvpservice.com/product/view/basic/3690299