This evening my daughter lost her 5 week old. She was fine all day, we played outside and she was active and happy. I gave them some milk when we came in, about 6 oz since she was eating grass today and 2 hours later she was dead. We have had her since she was a week old, she didn't take the bottle well and struggled to get enough at first but has been taking 6-8oz 3 times a day for the last few weeks. They have started eating hay and of course they like fresh grass, we also do not treat our yard with anything. When we got her it was because her mother wasn't doing well but I hadn't seen any signs of illness. We also have another baby from the same herd, they were quarantined together. I have checked everything I can think of, temp, stool, appetite, activity, and famacha score are all fine, but at the same time so did Ellie's before she died, although I didn't have current temp because I didn't think there was any reason to take her temp. Also, should I worry about quarantining our surviving baby alone? They were set to go into the barn soon but now I'm not so sure.