I had a fellow give me some of his secret brew a couple years ago that worked great on blue cats. It was cow's blood and garlic mixture. I cut bream and crappie up and would soak the cut bait in this mixture and the blues loved it. I did better just after a big rain when the water was muddy, fishing flats 3 to 5 feet deep. They hit it alot better than fresh shad, I guess they could smell it better. I went to Bass Pro shops yesterday and bought some Crappie Berkley scent, will give it a try on my cut bait, I know the crappie fishermen catch cats on their crappie jugs when they use it. I am after Blue Cats only,what has worked for you?