I have been giving it to my cows for 5 years now. It causes them to have anxiety. More is not better in my opinion 75mg/ml max per day. I also recommend getting my cows off it for the same amount of time while on.
One thing I have found is the Cows don't have the same reaction they did the first time. Basically the first time is the best and ti goes down from there. I have found you need more "TH" a year down the read and you still get less resulsts even if you cycle. I have summed up that TEST is the best as it makes the brain feel positive and no anxiety etc.