If you happen to have a production red roo, especially one that grew as fast as her, I would breed them together. Sure you dont want them developing like a Cornish X, but a line of faster developing birds for their table manners would be quite nifty...
She looks normal for a PR hen, but not considering her brood mates are so much smaller and less developed. She may develop that infamous PR floppy comb like so many have.