I have looked at them and I cant see any thing on them, howver 2 days running now when I have gone in the pig shed I have come out with a raised lumpy bite - first I had one itchy job on my wrist then tonight I was dragging out the hay form the bag to chuck in the hutch and I felt a nip on my leg, went inside and I had 3 little raised spots up my leg so whatever caused it went up my jean leg - I did not have contact with my pigs it was literally open shed chuck in hay job done..... what should I do - anyone else had similar - I have had a bath and feel all itchy now though is probably more in my head so to speak.... fill me with your wisdom....