On another thread about CC, someone made a very salient comment about CC hitting feed. I think it was jludwig but can't recall.

This person talked about how early on, you don't really see the CC feeding. Perhaps they are too timid. But once they reach a certain size to where they are not at risk from other fish or factors, then they will be very visible and active when feeding. This was also based around a comment about CC more likely to feed at low light conditions, but the person talked about how once they reached a certain size, you'd see them come to feed at any time during the day. This has matched my experience.

So, my guess is that you won't really be able to see CC feeding for a year or so, with certainty, until they get to the 12"+ range, or so, or maybe larger.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."