I have two (2) cats that have grown up with the chickens. Over the weekend when I was cleaning out the coop, Smokey sat on on the roosts and watched and kept me company, coming up the chicken ramp to get inside with me. The hens and roosters COMPLETELY ignore them, don't feel threatened at all. If we are in the run, they cry by the fence until we let them in to be with us all. It really is something to watch. I have no worries at all, even when the chicks were young.