If he ate the mountain lion then okay. But I really doubt it, I imagine it's just a taxidermy mount. As far as squirrels go, I've never shot nor eaten one. Though, on a hunting trip a couple (3) of decades ago my f-ing idiot former bro-in-law shot one right in the eye with his .22 rifle just for fun. The Hunting Gods were not pleased. We were totally blanked all weekend and he was really pissed off. On our way back to the West side heading over Chinook Pass, he's driving himself, me, and my friend Rob in his truck when he suddenly spots a prime 3-point buck (that's 3 points on each side for you east coast folks that call that a 6-pointer) just standing beside the road. After dark. After legal hunting hours. So he instantly pulls over, gives Rob a really bright spotlight, and whips out his hunting rifle (which it turns out he didn't unload and was illegally driving with a loaded gun on the highway with no CWP). I think I mentioned he was (still is) an f-ing idiot. I told him to not do this bullshit, then plugged my ears with my fingers when he shot from the cab, across the highway. Then he shot twice more because the deer refused to die. The decoy deer set up by the Dept of Fish and Wildlife. A damn robo-deer. It was amazing how quickly the flashing red-and-blue lights showed up. I got thoroughly questioned about my part in all these shenanigans but I believe they must have had close-up surveillance on the spot that dumb-ass parked because as unlikely as my pleas of innocence might have sounded they didn't doubt anything I said. One question they asked was "Why didn't you stop him?" I was like "Look man, number one he was armed and I was not. Number 2, if I piss him off and he kicks me out I have to walk back home over a damn mountain pass, and I need to be at work at my new job like tomorrow morning." So they told me to choose better hunting partners, and wrote criminal citations for dumb-ass and Rob. They both spent a weekend in county lockup, Rob got his rifle back with a couple of year's suspended hunting license, and dumb-ass lost his rifle and had a longer hunting license suspension.
The lesson (well, one of the lessons) here is that you should only shoot what wildlife you intend to eat. Otherwise you risk pissing off the Hunting Gods. Just sayin'.