Dig a hole in advance somewhere it won`t be noticed or make a burn pile. Soon as you shoot the varmint bury or burn it and don`t tell anyone. No evidence no crime.
OK now I don`t mean to sound cold but dealing with excess cockerels is just part of raising chickens. If you can`t find em a place to go or process them to eat you could just let them out of the pen and let mother nature take care of the situation.
Yea treat her legs now. Pretty common for a hen to stop laying when moved to a new flock or home. She should start laying again soon especially if you fix her leg mite problem.
Those trees are too large to be trusting a rope to guide their fall. Do a Youtube search for more safe and effective methods and always clear the first tree from the area if your going to drop another one close to it. Much easier and safer than trying to pick your way thru the limbs of two or...
Chicken wire on the top of my small run for the last 6 years, never had any break in`s. I don`t lock em in the coop at night, just close the doors to the run. Out at sunrise to free range on 3 acres locked up at sundown.
You could install a temp ramp 2' 1/2 to 3' long to the nest box. I set up a feeder with chick starter so the hens can`t access it, same deal with their water.