You can refreeze chicken as many times as you need to, as long as it is still safe to eat. When chicken is frozen, it creates ice crystals that can damage the cells and make the chicken less tender and juicy. However, as long as the chicken is still within its expiration date and has been properly stored, it should be safe to eat. If you are unsure, it is always best to err on the side of caution and throw it out.