Hi- My daughter is raising her first 4-H lamb and in the last few days it has developed a problem. The lamb is otherwise healthy and 5 weeks old. She seems ok in the mornings, playful and has been eating well however as the day progresses she starts this very abrupt almost violent head drop motion and freezes like that. Some times she will kick her leg. We initially called the vet and he said maybe a selinium/ vit E deficiency so she was given a BO-SE shot he also gave her a tetnus antitoxin and C&D Antitoxin. This was two days ago- yesterday we talked to a gal that raises sheep and she said it sounds like a bot fly issue and suggested ivermectin which we gave last night. Today she seemed fine in the morning and has started her head drop act again this afternoon. I am going to try to post a video of this. If anyone has a clue or has ever seen this before please let us know. I am posting a video on you tube "sick lamb head bob" should be up soon.