To say that your child is more likely to be picked on - are you not therefore subconsciouslessly labelling your child as a "victim"?
I voiced my concerns about dd to her teacher last year. dd is very quiet, afraid to speak out if someone hits her, would dissolve into tears after a friend had been and only then would admit that the friend had stolen from her. I explained to the teacher that as I had been bullied, I had been a quiet child, I had been "different" and therefore I feared for dd. The teacher very wisely said to me, "but your dd is not you. She will not have the same background as you, the same upbringing, the same personality. Just because this happened to you does not mean to say it will happen to her. You need to look at your dd for who she is and not with fear for what she may become".
I thought long and hard about that and realised that I had conditioned my child. I had told people that she was quiet and shy, therefore she would say "I'm too shy to speak to so and so". I had labelled her without realising it.
I now encourage her to talk to me about her friends and if there is a problem, I let her see me going to her teachers to talk about it. I let her see that by confiding in me, action will be taken. The bullying can stop if she talks to me or the teachers, it has stopped and I think that is the most important thing you can tell them.
And tell them every day how brilliant they are, how you love them for being different. Praise them when they speak out, praise them when they confide in you a problem. Make your child a confident communicator and one who believes in themselves.
You can't protect them from the bullies, but you can give them the tools they need to deal with it effectively.