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Anonymous
>>166209 >>How can one say obesity is genetic?
Scientific studies, maybe? It's pretty hard to argue against hard evidence.
Also, you can't become obese if you're constantly at the brink of starvation, but when you have just the amount of food your body requires, your body will either a) burn that energy happily so that you remain lean or b) slow down your metabolism so that part of that food can be stored as fat. If your ancestors had to survive severe food shortages, it's more likely that your body will respond with option b.
As for cats, I doubt they have such adaptations. They might have genetic mutations that e.g. affect the amount of leptin, but that's bound to be rare. Most fat cats are just overfed.
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