I CAN'T CHOOSE

I JUST CAN'T CHOOSE TO GIVE UP EITHER CAT. I DON'T WANT TO CHOOSE ONE LIFE OVER THE OTHER. I AM CONFLICTED (TO TEARS) THAT THE ONE HATES THE OTHER AND A DAY AFTER DAY OF PERPETUAL GROWLING, SNARLING AND HISSING IS MY LOT IN LIFE.  I NEED PEACE AND QUIET AND NOT PURE VENOM FROM THE CAT I RAISED FROM SCRATCH ONTO 8 YEARS.  WHY HAS IT COME TO THIS?  1. I NEVER SHOULD HAVE RESCUED THE PITIFUL FOUNDLING 2. BECAUSE I NEVER THOUGHT THE RESIDENT WOULD TAKE UP UTTER AND COMPLETE SCORN. I CAN'T LIVE WITHOUT THE ONE; I HATE THE OTHER NOW BUT HOW CAN I KILL HIM? WHY HAS THE CASE OF PURE DILEMNA OCCURRED THANKS TO FATE?  I THINK MY CHOICE IS KILILING ME. YET I SAVED A LIFE AND NOW RUIN ANOTHER LIFE. GOD HELP ME!