I was learning the halachos of Shiluach HaKen recently, and I was stunned to find that while the Shulchan Aruch discusses the halachos of the Mitzvah at length in Yoreh Deah 292, not once does he address how one must send away the bird. Checking other commentaries there yielded no results, either, as did checking the source in the final chapter of Chullin.
How must one send away the bird?
- Must one physically pick it up and throw it?
- May one yell at it or otherwise scare it away, without making physical contact with it?
- May one leave a trail of bread crumbs to lure the bird away from the nest, drawing it close rather than sending it away?