No I dont have pictures of my coyotes,I have only 8mm video and I dont have any way of putting on here but I will figure it out to prove a point..And yes there are some mange riddin yotes around but we hunt them very hard here and dont see it very often.It would be a lie if anyone would say they never shot a bad yote,.I usally kill 30 to 50 a year with all the cattle around its pretty easy.
In the 80's when we trapped very hard for them we had buyers come to us,with 300 + coons, 200+ muskrats, 25 to 30 beaver, 50 yotes several mink,10 or so foxthey liked us and we took good care of our fur.Our buyers would never walk away from our yotes/coons cause of our good prime fur.Any more we give them to our kids to sell and dont get involved with the selling.
So getting to our arguement,I am not disagreeing with you about the belly fur.There is alot more to sell.So if shooting a yote with a high power be it a 25wssm or my .220swift it dosent matter stay away from the back.So you killed afew that didnt tear them up, "great" I have a hunting partner with a 25/06 and I have seen it destroy there fur when hit high on the back. Why ruin what is there,I try forcenter massshots mostly and it seems to be the best for what Icansew back to stretch(not that I do it anymore). Those long guard hairs represent primness of the animal, that marking as you call it is the longest of all and is most prevalent when fully prime(if not half dog) Dont try to tell me that the buyers arent looking at that I have sold way to many furs for that BS.What about that seems to set you off.It is good advise.
I would guess that I have been varmint hunting longer then you have been alive.So I think I can speakjust a little aboutfur.

I do like your fox pics they look very healthy.And I to have killed a great blond yote 20 years ago but I sold it to a buyer and he mounted it for display at his shop.