@swampsnyper will back me up. We cooked squirrels last weekend and some got done much quicker than others.
It's easier to find frying squirrels early in the season. The woods are full of yearling nutters then. Kinda like fawns in bow season. But, very few hunters will kill an innocent-looking spotted fawn. It's much harder to identify a young squirrel before you put hands on it, and most people have no qualms about eating them. They're easier to hunt because they're pig-foot ignorant, so a lot of them fall prey to human or other predators by late season.
I generally fry them in groups. If I have a limit of 8, I'll separate the fryers that can go straight in the grease. The others I'll pop in an instant pot or simmer for a bit to loosen them up. Then they all go in the grease together. You have to be really careful though that you don't over-cook them. Usually the pre-fry boil evens out the difference. But sometimes you end up with one that sticks in your teeth something terrible unless you really slow cook it.
It's a much more predictable affair to just pop them all in an instant pot and pick them. More work for me, but it produces a much more novice-friendly dish.
Although, about the best dang bbq sammich I ever made was the result of taking 2 or 3 squacks, putting them in aluminum foil with some leftover bacon, onion, belpepper, and dry rub, and smoking them until tender. Picked them, added a little pickled onion and vinegar sauce, and munched away. 5 bites of heaven!