I’d love to hear the perceived daytime threats to predators you mention. Can you provide the link to your other post? We have dogs, but they’re only outside when we are outside. I am a softy and really don’t want to harm the fox. But I do want to let my chickens out. They’re always closed in at night. So daytime is when we may have problems. Also, our chickens are not small. We have Marans, Orpingtons and other medium breeds.
		
		
	 
Post in thread 'Fox Attack: Free Range, or a New Life Behind Bars?' 
https://www.backyardchickens.com/th...-a-new-life-behind-bars.1477431/post-24615549
Its pretty simple, time outside is the key.  I installed an underground fence for our dog out of respect for our neighbors.   He would go off and explore but if he jumped a deer he would chase it until he realized he had no chance of catching it.  This may take him across the property line and around here, a dog that chases deer on someone else's property will get shot.  So to keep "Charlie" safe and myself in good standing with the neighbors, we put in the fence.
The added benefit is that he can now patrol the 1 1/2 ac yard all the time which includes the chicken coop without my supervision.  
I am building our property into a homestead/small scale farm enterprise which means i am always outside gardening, building fence, mending fence, tending the chickens, mowing, building barns/sheds, and i do a lot of wood working.  So there are noises and activities going on somewhere on our 47ac property virtually everyday.
I understand that things may be different in my situation because i am fortunate enough to be around all day but the principles are still the same.  Folks don't always believe me when I say that we have every predator from bears to bobcats on our property on any given night, or think im exaggerating, but I  run trail cams looking for deer and turkey and will see nightly an assortment of predators.
 There are predators that are bold enough to take the risk but the vast majority will not risk personal injury if they can avoid it.
A friend of mine has a conventional coop & run setup and had a fox investigating the coop one evening.   He added cheap metal pots and pans on strings to clamber around making noise and even turned on a radio.  It worked for awhile but fox are intelligent and it got used to the noise not being associated with any danger.  I told him to walk their dog around the coop to use the bathroom at least once a day.  According to trail cams, the fox hasn't been back since (in daylight) for 5-6mos now.