I let the heifer out of the yards today because she wanted grass but would not eat alfalfa or sweet feed. She looks terrible. I think she is drinking so she has a chance. A vet visit is worth about the same as the value of the animal if she were healthy (Australia) so that is not an option.
Very interesting that you mention iodine deficiency. We have problems with benign foot rot in sheep, foot abscess in bulls, foot abscess in sheep. There is an odd skin condition in the cattle, between the back legs above the udder. I might post picks of that here sometime.
I had been enquiring about zinc deficiency and those problems. I will add iodine to my list to research.
We know we have a severe Selenium deficiency but they are all needled for that annually.
The previous owner shipped out a few cows with lumpy jaw at the time we purchased this place so that has been here too.
I will get some mineral for her and perhaps a molasses block to make her feel better if nothing else.