She wants to buy more productive animals like cows.

CNN: From Beverly Hills to shoveling manure on a farm

Several other farmers are keen to take slurry to spread on their own fields, and ways to deal with worries over water pollution are being squared with the EA. As for animal welfare, Peter Willes, one of the dairies' co-owners, points out that it is in his own economic interests to keep his animals happy and productive.

ECONOMIST: Industrial dairy farming

Mass screening of this sort is not, itself, a new idea in the search for drugs, but extending it so that it can study effects on entire animals rather than just isolated cells should make it even more productive.

ECONOMIST: A better way to find novel antibiotics