How do you keep coyotes out of your chickens ?
That's easy, save your urine.
Walk the fence every two or three days and 'Scent' mark everything around the chicken run.
Farmers locally used to hire us kids to hunt the coyotes, and walk the fences.
Most coyotes will have to be pretty desperate to cross human scent to try and take a meal...
Walk the fence, slosh around or spray the urine to mark territory.
Remember, it's not just where you slosh the urine, but how high.
You wan to lay it down a little above shoulder height on a full grown coyote.
They will associate a VERY LARGE coyote/dog/wolf with urine scent that high, and they will stay away from a dominant coy that large!
If you have a dog, take him along to spray everything in sight too, that will help, and the local coys will start to associate the dog scent with yours, and figure there is a pack already working that 'neighborhood'...
Coys are singular animals and don't like to be in 'Pack' territory.
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The absolute best way to be rid of coys is to hunt them.
Use a 'Distress' call with an artificial decoy,
Be ready on the rifle, because when coys come in, they come in FAST and there might be more than one come in at once.
Being singular hunters, they will stand off knowing there are other coys in the area, but when one starts in for the kill,
GREED/Competition gets the best of them and you may have 3 or 4 come in at once. (good time to be hunting with shotgun or AR-15 rifle!)...