Matt Baker and Anita Rani head to County Down in Northern Ireland to catch up with the dairy farming Lilburn family and their quest to diversify. Matt jumps into a tractor to help cut grass to feed the cows, and he discovers how ‘zero grazing' works. Anita helps check the calves' health with a cattle nutritionist, before seeing how the farm's milk is being turned into ice cream ready for the summer months ahead. Elsewhere, Adam Henson discovers how science is helping to save rare breeds, Charlotte Smith investigates a ‘shadow pandemic' of rural domestic violence, and John Craven launches the thirtieth Countryfile Photographic Competition.