I'm new to farming and large animals. I have a 700lb heffer that has gone off her feed. Stands with her rear feet close together up under her body. Her head is hanging down and getting lower each day, but her ears are not drooping. She was acting like she was cold on saturday and had shivers all over her. the shivers have subsided but she still has a slight twitch/reflex up in her neck. she has not chewed a cut that I have seen in days. Any thoughts or suggestions before I butcher to end her struggle, I dont think she will make it another day.