can I vaccinate hens who've had fowl pox

[zookeeptd]

I know some of my hens had fowl pox last summer but not sure which. Can they be vaccinated now? thanks

 

[dawg53]

Your birds that had fowl pox are immune to that particular strain.

 

[zookeeptd]

but will it harm them if vaccinated? I have several hens of several breeds and I can't remember who had pox and who didn't