I feed my spikes but each one needs to be fed individually, as they will fight each other to get to the food.
What I do is separate one or possibly two spikes from the container. Then I put them on a hook and allow them to eat as many bluegills, perch and crappie as they can. When they are full they usually fall off the hook and I begin feeding the next spike.
It is a very labor intensive process but I do enjoy it.