Why is this happening?? She is about 6 or 7 months and is super skinny. About 3 weeks ago I found a weird looking scab on her neck and thought it was from one of the other goats, but now I'm assuming it has something to do with this. She lost all her hair OVERNIGHT 2 days ago, this photo was taken yesterday, and today it is already way worse. I've checked and it doesn't look she has lice or anything visible like that. I'm somewhat new to goats so I don't know all the signs I should be looking for. I picked up some Ivermectin today for her, and have yet to give it to her because I don't know the proper dose. She is acting like usual. All my other goats are completely fine.