Dont waste your time with those preserved shad. Ive tried like 3-4 bags of em with no luck. Tried em on the bottome under a bobber, still, slow retrieve, and moderate retrieves, not one bite on em to date.
If your going for catfish, my favorite baits are hot dogs (run a treble hook through it, if your not having luck with it spray it down with wd-40 before casting it out there), nightcrawlers on a treble hook of course, small live crappie or sunfish i catch fly fishing toss a 1 oz weight about 2 foot up and run a 4/0 or so round hook through the tail lips or back, small frogs same method or chicken livers (leave em under your hood or in the truck bed for 2-3 days before using so they are nice and "aged").