this post was submitted on 23 Aug 2023
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Terribly! They promised 80-90% reduction of methane back then, but recent trials in Aus show it having less than 30% reduction and the cow looses considerable weight. So the end result is more like 10% reduction and long term effects on the cow are still to come in.
There is another one available now that claims 30% reduction (forgot its name) but I've not seen any real trial results yet.