When I feed a baby snake, I get a bunch of pinks, like 25-50. Divide those into three groups, small, medium, large. I start out choosing small pinks and gradually increase the size. After I get to large, and the snake's weight is slightly above the Munson Plan weight for double pinks, I change to the two smallest pinks there are, and then use up the pinks, gradually increasing the size. I will do the same thing with fuzzies- I like it when I get a bag with a nice variety of sizes. I start with the peach fuzzies and slowly increase the size. I won't feed a growing cornsnake two fuzzies (or larger) though; I'll move up to the smallest I can find of the next size up. If you have extra pinks or fuzzies, save them for the next baby, or for an adult who is going through a picky stage.