My experience is they make excellent forage for LMB. I wouldn't worry one bit about them. Sure they might be to big for the LMB now, but in a year or two, the larger LMB will enjoy them. As far as them using feed, well eventually they will be consumed by a bigger LMB, and the feed is not wasted then. Meanwhile they "might" breed and provide little sized forage for the young bass.

I have creek chubs in a separate area of the farm, and when I use one for bait it in my pond, it never fails that I catch something. Great bait/forage....