I just tell them (if it is what is going on) that it hurts enough I can't relate it to a number. if it is below what I would call a 5, I probably wouldn't be in front of them.
Timothy Norton wrote:I grow Russian Comfrey as a perennial for my hens but I have not tried it in a rotating pasture system. I keep it away from their grazing in my current setup as I'm unsure how much pressure they would put on the plants but perhaps it could be worked in?
I have also found grape leaves are browsed by my chickens so if a plant was allowed to establish enough, low hanging leaves would be pruned by your hens! The trick now is keeping them from scratching down to the roots...