Once there was 1, now there are four

A few month ago most of the cattle and calves were moved off of Lamberts Castle, leaving about a dozen left. Then one day I spotted a red haired calf amongst the others who was the same colour of the bull and a few weeks later he had a little black friend with a white face.  Now some weeks later two more black calves with white faced have appeared.  If you look to the cow on the right you can just see the little red haired one.