I would feel the red star would probably be more aggressive than the black star because of the breeds that went into producing her, but I also have never noticed a tendency toward pecking. My reasons for combining certain roosters with certain hens to produce sex-linked chicks were to separate the chicks at hatch and raise them for meat in one pen and egg production in another as well as charge the higher price for the pullets when someone wanted to buy chicks for their kids around Easter or set up shop for themselves. But I haven't done that for years. I am into more pure breeding right now.
In the case of the 3 'white' sex links that were mixed with the reds.......I don't know for sure what the case was but that sounds like sex-links all right, but male sex-links. White would be the shown color on the red-star, just as barring would be the case for the black star. I kept my females separated from the males for safety also. When raising chicks, and you notice pecking, it is usually the cockerals that cause the trouble; at least in my experience. The victim is almost always a female.
My solution for pecking in chicks is a sulfa sublimed concoction in a grease base. It taste horrible but has an antibiotic effect also, both topically and systemically; as well as erradicating the bad behavior. I picked this method up from a beagle breeder I used to know. I wouldn't hesitate to use the same method on older chickens if needed.
In the case of the 3 'white' sex links that were mixed with the reds.......I don't know for sure what the case was but that sounds like sex-links all right, but male sex-links. White would be the shown color on the red-star, just as barring would be the case for the black star. I kept my females separated from the males for safety also. When raising chicks, and you notice pecking, it is usually the cockerals that cause the trouble; at least in my experience. The victim is almost always a female.
My solution for pecking in chicks is a sulfa sublimed concoction in a grease base. It taste horrible but has an antibiotic effect also, both topically and systemically; as well as erradicating the bad behavior. I picked this method up from a beagle breeder I used to know. I wouldn't hesitate to use the same method on older chickens if needed.