If by typical, you mean he's dead on, you're right. They are minnows. Minnows or carp can be applied to all of Cyprinidae...and, even if the usage of minnow is restricted to certain North American Cyprinids, Pimephales would be included.
That is why I said "they are "carp" (Cyprinidae) and should be avoided as feeders"...I suppose I should have thrown in a "thus" or "thusly"...but there's another issue at hand...Rosies are often overcrowded beyond belief in barely-filtered aquaria that are rife with diseases. If you do wish to feed them to your Ps (knowing they had Thiaminase and had been kept in squalor), quarantining for a month is probably the safest thing you can do.
BTW, if you want to know more about them, Google "ChilDawg" and "Rosy Red Minnow hybrid" (neither in quotes) and see what pops up.