[Slimjim]

I have had a small mixed breed flock for about 3 years. During that  time, all 3 of the Poll Dorset ewes have developed a sore/ulcer lesion on their sternum. Despite topical infection and fly control treatment, they refuse to heal and remain a chronic, open 'wound'. The problem is confined to the PD's.
I have just one of the ewes left now, and she has also developed a nasty 2cm diam ulcer on the back of her udder that I am also treating daily. Anybody had a similar experience?