Went out to feed this morning and found one of our calves(approx. 100 lbs.- 1 wk. old) lying with all legs stiff and straight- was unable to get up. Upon examination, jaw appeared to be "locked" shut. I am treating as for staggers; ie, C & D antitoxin and also with oxybiotix 200. Has anyone had anything like this and can you offer any other suggestions I might try? Thank you.