My wild foxers prefer in-shell pecans to everything else. I have been buying 25lb boxes from pecans.com "for squirrels" / "not for human consumption" and they are very cheap: under $2 / lb. You can find them here:
https://www.pecans.com/squirrel-pecan/
I'm now starting to worry about whether "not for human consumption" is suitable. I've been cracking them open to check for mold and about 1 in 10 are bad. Seems dicey. Any thoughts?