I just had one of these moments:

Just thinking out-loud here... If wry neck is caused by a thiamine deficiency, and amprolium (the stuff in medicated feed) can cause a thiamine deficiency, wouldn't be best to feed a non-medicated feed? I have no idea what you're feeding, but if you are feeding medicated feed you might want to look into this.
-Kathy
Just thinking out-loud here... If wry neck is caused by a thiamine deficiency, and amprolium (the stuff in medicated feed) can cause a thiamine deficiency, wouldn't be best to feed a non-medicated feed? I have no idea what you're feeding, but if you are feeding medicated feed you might want to look into this.

-Kathy