I agree with the above, however I was reading something interesting recently about behaviour and fleece patterns where highly patterned fleece, such as zebra patterns or very coloured ones, can cause piggies to be more on edge. Their eye sight isn't particularly good so it stands to reason that a more confusing pattern/environment could make them a bit uneasy but I don't know how true it is. It's interesting though! I don't tend to go for fleeces that are too busy in any case.