Silkies are fabulous pets, I raised hundreds when I was a kid and highly recommend them, but not as reliable egg producers. They are bantams and the larger hens will compete better, at least getting more of the food, etc. even if they don't actually pick on the silkies.
If you are not set on getting large eggs, consider getting a flock of all bantams, then the silkies will be on an even footing. Or, get a few silkies and keep them in a separate pen. In any case, getting only silkie hens is going to be tricky unless you find someone selling them old enough to sex, and really, half the fun is raising them from chicks and making sure they are very tame. If you raise chicks, what will you do with the extra roosters? Even giving them away is hard, unless there is an Asian community near you, but I assume you'd rather your pets not end up as dinner. Just giving you some things to think about . . .
Actually, making a separate pen for a few silkies is ideal. You might find that having a rooster in there is really pretty nice. Silkies roos can be either the most gentle, placid roosters around people, or they can be downright mean to everyone except their hens. I have no idea why some are nice and some are psychos. In the pen I built for my nieces silkies, I have it divided for 2 groups, a roo on each side, and one roo is so aggressive he will charge out of the coop and free fall to the ground to try to peck you, the other one is sweet as can be and has never tried to peck anyone. The mean roo is simple to catch, just open the door, wave you hand about 2 feet out and he will come to you. He's so discombolulated by the fall, it's easy to grab him and hold him in a way that he can't bite. You can do it over and over, he never seems to catch on that there is not more coop outside the door. As someone mentioned, they aren't the brightest bulbs in the coop.
If you are not set on getting large eggs, consider getting a flock of all bantams, then the silkies will be on an even footing. Or, get a few silkies and keep them in a separate pen. In any case, getting only silkie hens is going to be tricky unless you find someone selling them old enough to sex, and really, half the fun is raising them from chicks and making sure they are very tame. If you raise chicks, what will you do with the extra roosters? Even giving them away is hard, unless there is an Asian community near you, but I assume you'd rather your pets not end up as dinner. Just giving you some things to think about . . .
Actually, making a separate pen for a few silkies is ideal. You might find that having a rooster in there is really pretty nice. Silkies roos can be either the most gentle, placid roosters around people, or they can be downright mean to everyone except their hens. I have no idea why some are nice and some are psychos. In the pen I built for my nieces silkies, I have it divided for 2 groups, a roo on each side, and one roo is so aggressive he will charge out of the coop and free fall to the ground to try to peck you, the other one is sweet as can be and has never tried to peck anyone. The mean roo is simple to catch, just open the door, wave you hand about 2 feet out and he will come to you. He's so discombolulated by the fall, it's easy to grab him and hold him in a way that he can't bite. You can do it over and over, he never seems to catch on that there is not more coop outside the door. As someone mentioned, they aren't the brightest bulbs in the coop.