My sheep have been shorn this week and I have noticed dandruff in the fleeces as well as remaining on the sheep, the shearer wasn't too sure what it was except that it didn't look like lice or scab ( they get cydectin injected and fly pourons are used during the summer which should cover against both of these, we don't dip them, and no patches of fleece lost prior to shearing). It is noticeable as they are black sheep and I was quite keen for the fleeces to be used for spinning the fleeces otherwise look really healthy, it this normal, or any ideas on the cause welcome and would the fleeces still be suitable for spinning?
Thank you