I would say for footholds,urine to canine trappers is similar to castor for beaver trappers.You don't need it to catch the critter but it gives you more options.

I use coyote urine to thin the gland lure enough to pour out of a pop bottle

Has anyone ever tried using their own pee? I'd love to know if that works LOL

Anyone think it works better later in the season (mating season) then early when more hobby trappers are out there.

I’m guilty of using it at every dirt hole, walk through, and scent post..I can honestly say I’ve never walked away from a set without using it and I use a lot of it at a dirt hole, even over my bedded trap area which is about 2x2 area..after reading the above comments I’m guessing this might not be the best..IDK..

Can one explain how using urine from a single coyote makes a difference at a set?
Does a coyote react differently when using urine from a single versus mixed urine from
several coyotes?

Im not calling Sleepy out, I just really don’t know...I have single urine but not sure why? Just because I guess..

Yep, one time, ten feet from the set. Had to go. Two days later i caught a coyote.

if you believe that you probably don't remake a set after a catch either

Not going to try. Anyone done well with no bait or lure? How bout a box trap for cats with nothing but the trap?

I never use urine. Do just fine. I never figured if I was using a decent bait or gland lure I needed another bottle.

Bladder urine, or wet pee spot in dirt or pee in snow I use, seems to help catch the group

I love urine. Good stuff when the ground is dry.

I use more of it in spring when planting my garden. I squirt it on the fence posts and fill salt cellars with it to set around the perimeter. This is for DEER repellant.
I'm not positive sure that it works but I sleep better at night.....

I've got some ground to sell you here in Nebraska..... real cheap......deer around here love to come to urine.

I've done both, One season I used urine at half the locations and half I didn't. Seems I caught quicker at the locations where it was used. But to many factors at play to be conclusive. Now I use it at every location but not every set. Single male seems to crank the old dogs up but again to many factors at play to be conclusive. The territorial reaction can't be understated, just a dog being a dog. They just gotta overmark where another dog pees.... When urine is used for its intended purpose its priceless. It only takes a squirt!

I have seen where coyote pee in same place I did 1-3 days earlier

Isn't there enough urine already in the catch circle? Serious question.
I'm sure you catch more than me, I've just always figured that there was enough urine (and other animal smell) that adding urine would be a waste......

I let my dog pee on a scent post set last year and had a coyote in the set the next night. I think since they can see, smell and know my dog has a "territory" it makes it more real. My dog gets turned loose in the morning and pees on what seems like random spots , but I'm sure it's where other k9's peed that night.