....near the chicken coop. Our coop and run is built along a retaining wall of massive concrete stones which he can fit between and must be tunneling behind. As the coop is off the ground and the chicken food inaccessible, I am pretty sure he is raiding miscellaneous food scraps from the run. I am still a newbie to the chook world so would welcome some basics on rats. IE: Will they harm the chooks? Will they transmit disease? Should I be concerned and work to exterminate or should I simply change the food scrapping? In short I would like to understand why rats are/could be a problem and what to do about it. Thanks for any words of wisdom you may have to offer!