It was mostly the manganese. The cows wouldn't drink the water , so then they weren't producing as much milk. They were losing weight and had runny manure. Towards the end, some of the calves had birth defects. One calf was born with an uneven face. The one half looked permanently swollen (it was a bull calf so it didn't really matter). My favorite was a calf that was born pretty small. She was only a little bit more than knee high, where as most calves were about waist high.
With my goats, it was heart breaking. Some did better than others. Some were losing weight. They all would get diarrhea if I didn't keep them loaded up on minerals. When they were finished growing, they were a little smaller than they should have been. It lowered there immune system pretty bad. I had goats for ten years. Every time the babies were born, we would disbud them and we didn't give them tetanus shots. Well that last year of breeding, I knew I should have given them their shots first. My parents went and disbudded them anyway. Seven out of eleven of the kids ended up with tetanus. At the time I didn't know that the horse vaccine would cure it, so I lost some very beautiful babies. A year and a half before that, my first girl got sick and died. I didn't know what she had until months later when another of my girls got sick. She was younger so I actually saw all the symptoms. They had gotten lysteriosis. I later realized where they would have gotten the bacteria: normally I fed Purina or other name brand feed. But when I was low on cash or couldn't drive as far, I would get feed from the local mill. Since their immune system was so bad, even the littlest bit could effect them. Where as an animal with a good immune system could fight it off. We also had calves that were getting sick and would die within a few days. They had most of the same symptoms packed into a short amount of time. Eventually, I just couldn't take anymore and decided the best thing for them was to find them a home. So I sold them cheap to someone who said he'd keep them together. He lied. Sold the one buckling, that was absolutely perfect, for meat. This buckling could have been sold as a breeder for $300+. He was the most perfect buck I had ever seen. Luckily all the adults and some of the babies made it to someone somewhat better. I would go over and visit them. Their immune system was permanently damaged. Another got lysteriosis (she only fed feed from the mill), and they were still getting things that weren't common to the area.