It all depends. Are your chickens exceptionally mean? Do you have some that are bullies? If so, you would need to either get rid of them, or house your Silkies separately. Keep in mind, Siles are more 'strange' looking, so that attracts more pecking. You need to make sure you have enough room for the silkies to get away, and separate feeders. Be very careful when introducing them. You would need to put them in a cage, so your other chickens can see them. After a while, you might let them with your chickens for a while, and watch carefully. Don't let them out without supervising, unless you have watched, and our chickens are doing fine with them.