@twisted-acres-farm - did you notice it looking different when you received them? Did you receive the number you requested or was it perhaps an extra "packing peanut"? Were they shipped direct to you or did you pick them up from a retailer? Several ways a male could end up in the girls without it being an outright sexing error at the hatchery - especially given it's a sex link. Got a picture? How old are they? Not trying to step on your toes, but I have seen several folks misjudge a RSL as being male because they have so much more white marking than the other pullets in the bunch.