Several have asked about my avatar, so here I will share a story about how a close encounter with an adversary, changed an enduring battle against Mother Nature and her combatants.
We all know keeping a backyard flock alive is a primary objective. Food, water, and shelter, is the mantra.  Food and water, straightforward, lots of information available, do a quick search, fill in your blanks. You will know what will work for your flock.
Shelter, well here we have many options. You must design a shelter to protect your flock from the elements, 
INCLUDING PREDATORS. 
Indoor shelters, proper ventilation, size, manure management, predator proof, uncomplicated.
Outdoor shelters, an entirely diverse situation.
45 years ago, I built my first outdoor run using chicken wire. I was in high school and knew everything about everything. I hatched out 21 birds! I built a box and an outdoor run. Everyone knew chicken wire was the right material to use… I continuously lost birds due to neighborhood dogs, raccoons, opossums, fox, and I have no idea what else… My air rifle was by my side, I was determined to eliminate anything that disturbed the sanctity of my flock. There were many casualties on both sides …until I had no chickens remaining, and admitted defeat.
Fast forward about 15 years, I moved into a new to me "country home" when my oldest was just shy of 6. A good friend decided that every 6 year old needs a pet, and a great learning experience would be hatching and raising chickens. So he shows up on my 6 year olds birthday, with an incubator and 2 dozen eggs. She diligently turns each egg carefully twice a day for the required time period. I candle the eggs at the appropriate time interval, to see if indeed they are fertile.
I see nothing!!!
In a panic, I order 2 dozen chicks from a hatchery to arrive the day before the chicks are due to hatch.
I have a plan...
I place the chicks in the incubator with the unhatched eggs for warmth that evening.
My daughter wakes me up the next morning screaming with excitement!
She wants an explanation as to how we hatched 40 chicks from just 24 eggs!!
I now have 40 chicks, housed in a spare bedroom. I needed to build an outdoor coop and run, fast…
I purchase a prefab plastic shed and a chain link dog run. All set… Little did I know I was once again setting myself up for failure… I will not get into the details, but you can probably fill in the gory and the consequent battles against the natural predators. 
Casualties on both sides, until no chickens remained… I was defeated once again.
About 13 years ago my son remembering the chickens from the previous home, decides chickens should be a part of our family once again.
We had an old shed already on property, just needed some repairs…
Okay, we will do this together. I design the repairs, he will do the labor, supervised. We agree.
We rebuild the shed, fairly simple, now what about the run? I know chicken wire is useless and I know chain link fencing will not stop prying little hands or tunneling varmints. I settle on inexpensive 2x3 fencing, and surround the run on all sides, top, and 2-foot skirt. Satisfied on security, we add birds.
The onslaught of attacks were brutal. Every predator within miles must have seen this structure as an invitation for an easy meal. My defenses held them back, until… My little bantam rooster, barely larger than a Jersey mosquito, but with the heart of a lion, attacked a raccoon trying to gain entry through the fence.
I was devastated… I started a trapping campaign determined to eliminate all who dared enter my zone.
This continued for several years. One of my greatest battles against nature, until this one morning I found a fox kit in one of my traps. While relocation of predators was not my routine, I just could not bear to eliminate this future enemy. Too cute with adoring eyes…
 
Just a baby. I held him captive till I reinforced my run making him no longer a threat nor my enemy. 
He ended my war. 
He inspired me to create the strongest defense imaginable. Half inch hardware cloth supported by 2x6 lumber… A 200 pound dog would not breach this run.
It took about 2 weeks for my reinforcements to be completed, all while my captive enjoyed free meals and medical attention, he had fleas, tics, and worms.
He was released with a clean bill of health, and a belly full of my dogs food, lamb, not chicken! He returned often, as he became good friends with my dog. He was absolutely a beautiful animal. If I had a proper setup I would have kept him longer. I was too afraid he would lose all his wild instincts and it wouldn't have been just. As it was, he was not afraid of me holding him. Kept him for 3 weeks total and was sad to let him free, but the run was secured.  
Because of him, 
I have a run as secure as my coop.
Many fault predators for being what they are. Wild animals following instinct for survival. I made him very comfortable while he was in my care. I did not want him to lose his instincts for survival, and was very happy to see him weeks later still playing with my dog, trying but not eating his food or my chickens.
 
This little creature taught me a life lesson about compassion. About how a strong defense is often your best offence, especially when dealing with a battle you will never win. Moreover, about sleeping with both eyes closed, and knowing I did beyond to protect my flock.
Almost every day, with his picture, I am reminded and somewhat remorseful for my wasted time and life. For this I will be forever in his debt, and he will remain my avatar indefinitely.