I dident mind black snakes I would just get them out of my coop but I bet you wouldn't like them eather if one killed a $75 hen that you have only had for a week to.
I know for a fact it was a black snake because I saw It I walked in the coop and saw it biting my dead hen in the face than I ran in the house got my 12 gauge and a hoe pulled it out of the coop and blew it to bits.
I just had a black snake kill a good white silkie hen of mine. It's kind of weard considering farther back I have a coop with 45 month old chicks that it just passed by.