Jig,

Fish that see lots of fishing pressure get wise to us anglers. Go to any tournament and notice the good fisherman that come in empty handed on occasion.

A quick story that happened to me: I had just arrived at a local lake and bumped into a friend of mine fishing an adjoining pond. He was fishing shiners with no luck and was calling it a day. He asked if I wanted the remaining shiners he had left and I declined his offer. A few moments later he dumped his bait bucket into the pond where he was fishing and at least 6 bass came out of no where and gobbled up the live shiners before they could get their bearings. They didn't touch any of the dead ones and as quick as they appeared they also disappeared. Oh and by the way, my friend hadn't caught a fish that day.