Yeah, I've left a spent mash or two sitting too long.
If I made these for my greys, they'd gobble down the first batch, then refuse to look at one from the second batch. I have half full bags of rawhides all over.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk