My brown swiss heifer calved yesterday morning. Her calf is doing good and eating. She had an uneventful delivery all on her own. Now it's been about 36 hours and her belly is firm and still very large. She doesn't like to be touched so really feeling her is difficult. How do I know if this is serious or normal? We have a brown swiss/holstein cross that was her mom and she didn't have this issue. I read that twins could be born days or weeks apart. Could this be a possibility? Thanks! I'm really new to this!