After shooting any bait will need to "cure" a bit, but the larger or thicker, the more cure time you want to give them. On something like a senco type of worm give them a day in the fridge laid out flat on a cookie sheet. Frogs and toads or other thick baits I'd leave them in the fridge a full 24 hours. Once cured they will not take on as much of the oil and can be bagged without them taking shape if they aren't perfectly packaged.