I personally have never heard of this, but I would suggest that you quit feeding them the plants that they say can cause the issue! Then you can see if they improve or not!Another question about native plants...
I have noticed that some of my chickens have very red faces. I was wondering about photo sensitivity possibility from the plants I had been giving my chickens from the property. On some Toxic lists most of my plants are on there and some can cause this. How do you know if a chickens face is too red, or normal?
