Buckwheat says-
Hern...you tell me when you think there are air currents flowing right at ground level
Naw. You are doing the talk'n. I just ask a few questions to learn. You tell us.
My father raised Beagles. So I grew up with hounds. I learn there are different scenting conditions. Wet, bone dry, dew on grass, snow, wet snow, dry snow, ice covered snow, heavy leaves, pine needles & windy conditions.
Now there are many variables with a hound trailing a rabbit. Maybe even the rabbit isn't giving off much scent to begin with.
But scenting conditions play a major role for a mediocre hound. Good hounds are hard to find. I mean a hound that can trail in most conditions.
I offend wonder how many mediocre Fox are out there. I guess not too many or they won't survive past winter.
But it's still a possibility that some Fox don't fair well during certain scenting conditions (I have no way to prove this, just another thing to think about).
Light rain to drizzle all night with a fog or slight fog...Usually not a good time to call predators because of the fog...but the critters are moving ahoy on thesehere nights...my traps prove it. Could be prime scenting conditions, no wind, lots of ground level air current.