Were there obvious signs of calving like a protruding water bag, with correct feet/nose? If the calf was an abnormal presentation such as backwards with the feet back, you wouldn't see any visible calf parts. The thing I dreaded most was reaching in to grasp only a tail.
Did you reach in after the fact to determine if the calf was properly positioned in the birth canal? I'd be sure to recommend OB gloves and disinfectant for doing that.
I'm wondering if the heifer was actually in the calving process, or did she do something like get over on her back too far past the point of no return? I've lost more than one that way. Doesn't take much of a depression or incline of the ground to do it. If she laid over too far , it doesn't take long.
Sorry for your loss, and don't beat yourself up over this. Dust yourself off, get back in the saddle, and go on. The successes in this business are the only thing that make the failures worth it.
I know it doesn't help, but death loss happens to all of us. And if it hasn't yet, it will. Unfortunately, the #1 rule of the cattle business is that if you have livestock, you will have dead stock. :bang: :frowns: