Hello, I am new to this site and hope someone might have an answer to my sheep question. I have . We sheared my 4 yr year old "pet" ewe a couple days ago and discovered several lumps in various locations. Some very small and the largest about the size of a nickel and half an inch high. They were all filled with a nasty black greasy gunk that I got out. I flushed with peroxide and sprayed blukote. They did not seem to bother her at all. Any ideas what they are? Ps, we are located in mid Michigan.