I have not had this problem with the birds I have raised, nor have I had silkies, but I have been reading various threads and this is not uncommon for many breeds and is not an EE thing as much as a chicken thing: Removing her and placing her with a few mellow mates is good.
First Silkies have a rep of sometimes ending up on the bottom of the pecking order, could be their temperament, could be the silkie feathers, could be the walnut comb... however it is usually something that can be dealt with. Keep in mind even silkies can become just as aggressive as any other chicken breed.
First the space issue. I always increased the size of the box/pen I kept the chicks/chickens in as they grew. It seems the larger the flock gets the more likely this happens. So I think space is a big factor combined with size of flock in this issue. As adults mine had the run of the backyard, so if they got in tiffs, on each other's nerves they always had space, so no ganging up happened, some birds just don't like each other.
It's a dot/different peck it, is how chickens seem to think: Also chickens have a tendency to go for combs and earlobes especially if they stand out. Chickens need to expend energy and have stimuli like other animals and will develop habits that are bad (not good for them or other chickens). Maybe you should try making some toys, like ball with red dot on string and hanging it up, give those idle mind and beak EEs something to peck at.
Bully?: Observe the EE's see if you have a ring leader, if you have a bully bird that bird should target another bird, try removing the "bully" from the others for 3 days or so, to see if she/he calms down when reintroduced, sort of breaking up the cycle. Keep in mind the birds do not understand not having a pecking order and need it, but you don't want abuse or death either in their birdy society because of the pecking order. If you have an unbalanced dominate personality you may have to get rid of that 1 bird, but you should try modifying it's aggression via training, treat it like an aggressive roo that needs to learn you are head chicken and you don't want it pecking others, see aggressive roo advice (no hitting, it's a holding and finger peck thing you need to do, some people also use a spray bottle on the aggressive bird).
When your silkie is healed add to your silkie flock one of the EEs, see how they do. You are going for harmonious pecking order. If all goes well, gradually add birds, in essence you are creating over a period of time a new pecking order by mixing up the chicken clicks. This is a slow process, never rush it.
Also observe your silkie, is she a nervous bird? If the answer is yes this will often upset other birds resulting in pecking... you will have to teach her to be less nervous by doing behavior correction your self, see the various behavior threads.
Also there is some anti-peck products that taste bad to the other birds you can use on your silkie.
I hope this helps, I am no expert on this stuff, but it seems from the various problems on the BYC forum there are options to help your flock and most problems we humans accidentally contribute too.
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Lauravonsmurf,
Thank you so much! You have given us some great ideas to try & ideas of what to research on BYC. We appreciate your reply! I will start working with them today. I don't believe in violence to solve problems either & just want peace restored to my tiny flock. Thank you again!
Michele