Dear Graham, I'm a great believer in prevention rather than cure. Historically we have a high instance of milk fever (and all the annoying knock on effects - mainly short term down cows and RFM) but since using the Fresh Cow Drink immediately after calving it has all but disappeared. It's a great relief to know that the cow has had a good quantity of calcium (together with all the other bits) at this time of great stress - especially late in the evening when it might be a few hours before she will be looked at again. I have not had any down cows, retained cleansings or LDAs since I started using the product. I've only had one cow refuse to voluntarily drink and I think that was my fault for NOT offering it immediately after calving, the rest seem to relish every drop. Some of the larger cows have two sachets and I'm happy to give it to them. I've even had to fight some of the other dry cows off...they can smell it from a distance and all want some.