I have used bioflow collars with very positive effects on both my horses and my dogs. If I was going to try it on my pet sheep, I would put it round the neck but they are seriously woolly at the mo so might need to have a bit of a haircut first for it to sit a bit closer to the skin? There is the obvious risk of them getting caught of course but the collar should break before the sheep hurts itself...never the less, I would be very very vigilant about it (maybe only wear it during the day if you can be about to monitor the situation etc.?) Also, I never leave the Bioflow boots on the horses legs in the rain incase the skin underneath gets rubbed or sore. If my memory serves me correctly, they don't have to be worn all day for them to be effective, so if you are only about with her for a few hours during the day, maybe she could wear it then? Bioflow would answer any questions about this if you contacted them.