What are the current challenges to produce pigs with long tails?

What are the new developments in the world of animal nutrition? Last year, pharmacological levels of zinc oxide had to be phased out in diets for weaner pigs in the EU. These days, the feed formulation business is looking at the next challenges. One of them includes keeping pig tails long. An interesting dilemma is at the horizon, writes animal nutrition expert Dr Francesc Molist. Producing pork following sustainability and welfare standards is increasingly seen as a prerequisite for the cons