We've had one 8 month old hiefer die and another really sick with symptoms that no one can explain. The first one was found laying on her side, late in the evening, with froth and bubbles coming out her nose and mouth with each breath. We rolled her onto her other side thinking it might help. By morning she was dead. About 5 days later in the morning we found another one lying on her side doing the same thing. The night before she was perfectly fine. We immediately gave her a shot of Oxymycin and called the vet. The vet got there in the late afternoon. He could not say what exactly it was, only that it was respiratory. Her lungs were making a lot of noise. You would first think pneumonia but there were no symtoms like fever, lethargy, etc. Her temp was 102. Never coughed once. And there was no bloat. Before the vet left we gave her a shot of Banamine. This seemed to help. When we checked her the following morning we were sure she was dead because she hadn't moved. As we approached her she kicked and started swishing her tail but couldn't get up. We figured if she made it through this that we had better give her every chance we can. So we drug her into the trailer and brought her to the barn. We've been doctoring her with Banamine once a day. On the second day we tubed her with water because she still hadn't drank or ate. On the 3rd day (the day of this post) we doctored her with another shot of Oxymycin and Vita Jec EA & D. She tries to eat but is so weak she can't even sit up. She is better today than she was when we brought her in. But I'm going to have to get some nutrition in her soon. These hiefers have been weened for over two months and are all looking fantastic with the exception of these two rapidly occuring illnesses. Everyone here is mystified by this. There has been no change in feed. On the first day I did notice a strange looking poop. It reminded me of the first poops out of new born calves. Kind of yellow mucusy looking. There was also what appeared to be a little blood but nothing like what is seen when an animal has Coccidiosis. The girl is peeing and pooping normal now. When we walk in the barn her ears perk up but she hasn't come close to sitting up much less standing. One person thought that she might be brain damaged from lack of oxygen. Does anyone have any thoughts? Any replies will be greatly appreciated.