I shot many, back in the day and eaten many (as my uncle taught me - "You kill it you eat it"). The biggest squirrel is cooked just like the rest of the family of squirrels. How YOU like em. Old ones are tougher, and ya hear folks talk about glands and such. Young ones make good BBQ, older ones Cacciatore, etc.
In fact July 4 was when we would start to hunt them in western PA, with a 257 Roberts, or 243. This was my uncles rule, as he said by then the young were weaned. We hunted 6 evenings a week. It was how my cousin and I were taught proper safety and rifle use, by WWII Vets. One of whom shot for many years at Camp Perry.
Those were the days... On long shots you can see the grass part from the bullet. Then the TWACK before ya hear the BOOM. We had to step off every shot, hit or miss. A bad hit brought questions that needed answers, and ya sat out the next several opportunities at a shot, to think about it.