F'3, a few days.
Fox & Coyote I usually leave 'fur in' for 1-2 days (in unheated shed).
I then flip 'fur out' for another 2 days with wedge(s) in place.
After 2 days, the shape (form) of Canine should be dry enough to hold it's shape without board. At this point without board, pelt really has a chance to dried evenly.
In unheated shed, I should be able to sell dried pelt within a week or slightly less. That's with borax'd armpits, tail, pleated skirt & ears. And fan or two going.
Your time may vary with heated shed or basement, fan or no fan and so on.
Forestman, there are times when I remove saddle on fatty Coyote. Yes indeed.
Grey Fox, I usually remove saddle since they are fatty. Red Fox, no.