If you have chicken wire around your run, make sure your chickens are locked in the coop at night. Raccoons can tear chicken wire apart, no problem. I know from past experience. I'm not sure why they call it chicken wire, unless it's to be used around your garden to keep the chickens out.
I've never had a problem with raccoons during the day.
Once we built fort knox, coop and run, the racoons went away. We would see them out there occasionally, when the motion light would go on, and I'm sure over the past few years they make their rounds to check it out. It's my belief though, that without any easy food, they don't come around much.
Two weeks ago, hmm, a fox got one of my chicks out of fort knox, at night. Foxes being what they are, we put out a trap, with bait. We never did get the fox, nor have we seen signs of a fox since then, however, raccoons came in, they were attracted to the bait. We had already made rennovations to the chicken run, and the chicks go in every night, no exceptions.
Managed to shoot the big raccoon, did away with the trap with the bait, and have had no problems since.
If we do have again, we'll go with some snare traps around the run at night, with no bait.
Common sense says, that when you put bait out, to catch an occasional problem, the smell of the bait is going to make your problem tenfold.
Keep your chickens at night so nothing can get at them, and they won't come around much. If something gets them while they are freeranging, keep them in their safe coop and run for a week or so, and whatever it was will probably go to easier pastures.