Hard to tell from the photo but with the white bottom whiskers it looks like the flat bullhead, Ameiurus Platycephalus but could easily be a catminnow, Noturus Flavus.
I'd say it's either a madtom or a baby flathead cat. Either way it should be fed with foods that will sink and have a lil bit of a smell to it. Most catfish don't target food by sight, most target food by sense of smell and taste.