Wow I really like that hoop. Is it a tractor? Your flock is very coordinated with the grey, white and black with touches of red.
I *wish* that was my set-up LOL! It's a stationary hoop house on Joel Salatin's Polyface Farm, I just posted it to show rabbits and chickens living together. (I'm a big fan.) http://www.polyfacefarms.com/