Quick edit, both of these guys make in my opinion some of the most effective coyote killing bait/lure that is on the market. Their urine is top notch as well. I buy urine almost exclusively from Jameson but have used the other and have had good results.
I should add that I have heard from reliable sources that yotekillerbill on this site has killer stuff as well. The urine he sales comes highly recommended. I haven't used his stuff but I trust the guys I have talked to.
I use both, red fox urine and coyote urine.
I am a tinkerer and such with home brews. This year I mixed red urine, bcat urine and added 4oz of cavens red fox gland (I didn’t like this gland lure for one reason or another). Anyway, I added some valerian tincture and asafetida tincture (not sure of the amounts without looking at my notes). This mixture has accounted for lots of hooked up K-9s this year……I used it on scent posts and flat sets. I have been terrible with scent posts in the past, so I’m not sure if it is the mixture or I am just finally learning how to guide at a scent post, regardless of how the light finally came on, I just hope it stays on.