Ive seen many references to this Chicken Math but haven't had the chance to look it up!
My dogs share a fence line with my run. We had it secure (so we thot) but one evening my daughter came in and was yelling "buddy has my chick in his mouth"
the bottom of the fence line had a big root running across it and we figured they cant dig thru that. Well after our investigation into the death of goldie, we discovered a very small area where the root made a V and the dog dug a small area and loosened the dirt which in turn looked like it needed pecked thru. Add that with bad timing and u have a chicken thru the fence with a broken back. Buddy didnt puncture her or anything so she prolly would have survived if the hole were bigger. It was sad. So now we have landscaping cloth along the fence so they can't stalk them and the hot wire back up. My remaining BR was so miserable until we got 2 more (approx 4 and 6 wks) from a farm last weekend. She went from miserably alone to a mean ol dominant bird in a matter of seconds lol.