If you want to post a picture of your RIR's I could pull out my standard and try to look for faults or DQ's

As far as tips and tricks besides good health and no bugs/dieases/major problems, just make sure their feet, face, toes, etc is all clean and not dirty (usually the day before and of the show they should be washed, sometimes just with a baby wipe, others with a full out wash) And people usually put natual oil or something similar on their combs, legs, faces to make them shine for the judges, just make sure to not goop it anywhere and keep the nostrils clear!
I haven't seen a grand champion RIR is a LONG TIME, the last time I saw a large red bird on champion row was a New Hampshire rooster (absolutely HUGE) but I haven't seen a RIR make it to champion row in my last 3 years, but that may be just in my area
Another big thing though, if you got your birds from a feedstore, thats a no-no. Most feedstore birds are bred for production and visually pleasing but the poultry shows and standard of perfection (pretty much the chicken bible XD) has different standards for any certain breed. (Like leg colour, eye colour, leg colour, comb size and shape etc is not a worry to the feedstore breeders because their birds are gonna be sold for $2 to people wanting egg laying pets. Though feedstore birds are still great birds
