Yesterday, Omelet seemed so much better. Then today, she took a turn for the worse. I just went out and she is so congested. When she breathes, it sounds watery. Her comb looks all dried up again and is laying to the side, she's so weak that she can't stand up straight and she isn't eating or drinking now. Do we cull or continue the Tylan? How long does it generally take for the Tylan to show signs of improvement? WWYD? She's not even a year old.