I was feeling to see if my pregnant ewes might have bagged up yet and was noticing that my one icelandic ewe has 4 teats. Is this normal? The second pair doesn't seem very functional because they are smaller than the other ones.
One of my ewes has four teats, two of which look like non-functional miniatures. I do not know whether the smaller pair give milk. I'm not bothered by it, and don't feel that it is a problem. Some googling revealed this article from a University of Illinois website about a breeding experiment performed by Alexander Graham Bell in selecting for extra teats in the hopes of increasing ewe fertility and lambs produced: http://livestocktrail.illinois.edu/sheepnet/paperDisplay.cfm?ContentID=6721