It all depends on the level of sulfur. I was just talking to a nutritionist friend about our water this morning, and he said anything at or above 1400mg/L can result in reduced growth in calves, diarrhea, and at 2000mg, they're dead. It can also cause copper and zinc deficiencies under the right circumstances, because a high level of sulfur attacks the walls of the rumen and makes it very difficult if not impossible for the animal to absorb those other nutrients.
Best way to know is to test the water. We get bottles from the local Health Authority Office, and they test the water for free. Hope that helps.