Have a dog as a food taster, if the dog doesn't roll over and die, it might be safe to eat. sort of the canary in the coal mine, miners used to know if it's time to leave when the canary stops breathing.
Buddha didn't eat meat, except with one exception: if someone offered it to him, he accepted their hospitality and ate it. That's how he died, as it turned out to be spoiled meat and deadly. So, if you're a Buddhist, you may have mixed feelings. Beware of Greeks in Tojan horses bearing gifts. but don't look a gift horse in the mouth.
7th Day Adventists are going vegetarian, as they believe in the End Times, meat will become poisonous. SDA is deeply into Biblical dietary laws, and far beyond just pork bans.
but a nutritionist or chemist could probably give you better advice. Maybe the chemist could do a chromotography test on a meat sample, break it down chemically. which is why you probably listed this question under one topic of "organic chemistry," hardest chemistry course ever. for all time. but such tests are not perfect, and only give probabilities, not certainty.
PETA would ethically avoid eating meat out of Ethical Treatment of Animals concerns, aside from any nutrition concern or religious reasons. Not nice to kill people or other species. It's murder, unless some legal justification or mitigating factor. If a cow is about to kill you, it's ok to defend yourself, but usually it's a charging bull not cow that endangers your life. Cows get blamed for too much, such as the Chicago fire when Bessie kicked over a lantern. Don't believe it.
Then there's the global warming people who blame cows and cow meat eating for endangering the planet. Among other things they blame. Does Biden's Green New Deal and EV promotion include any banning of cow meat? Salmon is much healthier, except for the salmon. Jesus did stick to fish and ended the animal sacrifices. Global warming people tend to promote kangaroo meat though, especially if you're in Australia.
Or you could take a bite, excuse yourself, go to the restroom and spit it out. Or swallow it, then go to the restroom and vomit it up before it gets digested. Flush the toilet so he doesn't hear you vomiting, although if he did overhear, it might make him wonder himself about the safety of the meat, A Big Clue anyway, even if he's Clueless. The dead dog might be another Big Clue. Especially after rigor mortis sets in.
There's an episode of Married With Children, where Al Bundy cooks a barbeque, but needs some ashes for the grill. The kids scour the neighborhood and come back with some ashes. Al cooks the meat and the burgers turn out surprisingly delicious, super yummy, exquisitely gourmet. Then Al asks the kids where did they get the ashes. Chef's surprise. They say from an urn in a neighbor widow's home. Al & wife begin throwing up. End of meal. End of meat. End of story.
Don't Ask is similar to No one wants to know how a sausage is made. Federal food regulations require no more than 2 rat hairs per hot dog. Very reassuring. Although Don't Ask is reminiscent of a Bill Carter policy of Don't Ask Don't Tell. Is your friend gay? Which is ok, they're good cooks among other things. Kiss the cook. But don't kiss and tell.
Or google food recalls, a lot recently. Get on the Department of Agriculture email list, or FDC or CDC where they give alerts on food recalls, where meat products sometimes show up. Ask if the Don't Ask ingredients included any on the food recall lists
Or there's the movie with Marlon Brando running a secret restaurant for the rich to dine off of endangered species, such as the Kamoto Dragon, only Brando is faking it, serving turkey as the endangered species. Never Know what you're really eating. A little spice and hide the real thing. Plus put a real endangered Dragon in front of them, in a cage, to make the rich diners feel the taste to fit their visual perception. People do that with wine. Put a cheap Gallo wine in an expensive aged French wine bottle, serve it and the imbibers think it's equisite, the real thing. Your friend may be doing something similar, toying with your taste buds At least you know you don't have covid19, as loss of taste is one major symptom.
In mathematics probability and statistics, the meat is probably ok. Far safer than playing Russian roulette. But math is not about ethics social or personal concerns. Just cold math. Same with "science" or chemistry, just cold blooded "science" and chemistry, with no connection whatsoever to ethics, a concern of both the secular and religious. Stoop to just "science" or math, and you're into Dr. Frankenstein territory.
Just some ideas for whatever they're worth or apply or Not
Last concern: Eat it or possibly lose a friend. How much is your friendship worth. He eats it and he's still ok? does he have a dog? how's the dog doing? Lighten up. We're all going to die someday anyway. Unless You're a super health freak like a real counterpart to fictional Cal Tech Prof. Sheldon Cooper trying to become immortal transferring his consciousness and becoming a robot to beat the singularity time line.
Don't Ask questions, but say things and see his reaction, his facial expressions even if he says nothing in response. slowly pin him down. or Ask questions and even though he doesn't answer, he gives himself away in less vocal reactions. Visit his refrigerator and kitchen, check it out. get samples for testing. but hide the fact you're snooping.
but back to the question you posted, meat is easy to identify. If it's from a bird, it's turkey or chicken, from a land mammal, a cow usually, from the sea, it's tuna, salmon, carp or whatever swims. 3 basic categories, similar to our miltary, Air Force, Navy and Army, birds seals and dogs. Marines are amphibians confusing the classifications with frogs playing Jan. 9, 2023 in Ingelwood California for the national football college championship. Go frogs or bulldogs Air Force got left out Go D(fr)ogs forget about personally living or dying from meat, and think about your team winning Jan 9 carpe diem, especially if you placed a bet, although you may never collect if you die from the meat, but minor detail in the math calculus
7:30 pm Jan. 9, Go Dogs, no matter rat hairs in the hot dogs.
go Horned Frogs, if you cheat enough, only way you'll win, but go for it, as cheating is in, lately, in sports as everywhere. May the best cheater win, as major bets in Las Vegas entice cheaters to cheat ever more. It's the capitalist system Money wins. animals, dogs, frogs, pigs all lose, no mater which football team claims them