Multiple births in cows can have some disadvantages: they can lead to complications, it can be harder for the dam to go back in calf again and if the calves are of mixed gender, it is highly likely that the female is a freemartin which means she is infertile. This happens because the testosterone from the male calf in the womb renders the female infertile. It’s not always the case and we have had a mixed sex female twin heifer [...]
It has been a busy and eventful weekend here at Garrendenny. Brian knew that a cow expecting twins and in calf to a Belgian blue AI sire was due. She has been groaning for the last month and was of a considerable size so he was guessing there were going to be twin bulls in there.
He was pretty tired on Friday night and they were fairly tangled up inside her so at midnight he decided to phone for the vet. [...]