New animal welfare rules are coming into force on the 1st of October this year. Some of these might require you to change the way you farm. The changes that are important for dairy farmers are: 

No tail docking of cows at all, no dehorning without local anaesthetic (disbudding calves without anaesthetic is still allowed for another year,) and no pulling of stuck calves at calving with any kind of vehicle. There has also been a tightening of the rules around transporting and certification, to the point that if your animal is abnormal in any way you should at least talk to your Vet before transporting it. 

A summary of the latest changes can be found at:  https://bit.ly/2v8OpnM 

The complete codes of welfare can be found at:  https://bit.ly/1X87jFT 

If you have further questions, ask your Vet, we are here to help.