The Aberdeen is a very small calf and it's great for a first calf for a maiden heifer. The Aberdeen is also naturally polled (they don't have horns) but we may get a few stumps from their Holstein/Frisians mothers. The Aberdeen Angus is very popular and MacDonald's make their big macs from them. We often purchase Aberdeen /Angus beef ourselves.
We probably keep them until next summer, when they are ready to go to be cows or meat animals. It doesn't take long for them to become adults. We give them artificial milk re placer mixed with hot water, calf pencils and straw to pick at. It gives the smallholder a wonderful feeling of satisfaction when they have seen their 'dropped calf's mature to adult cattle.