No, "mutt" isn't the right term for them. They are the hatcheries version of RIR - they are "supposed" to be RIR, but aren't exactly bred to standard, just for their rate of lay. Does that make more sense?
Quote:
For the most part there are two popular types of "Production Red" one is a R.I. Red bred solely for egg production and selectively bred solely from the R.I. Red in doing so the "breed" lost a lot of the characteristics of the true Rhode Island Red (R.I. Red) .
The other type "Production Red" is a cross of a R.I. Red and a Leghorn.
Now there are some hatcheries that sell a R.I. Red /New Hampshire cross and call them a Production Red. To me not at all a egg production cross since the New Hampshire was originally bred solely from the R.I. Red to produce a more meat type fowl.