Three UK vet practices are now offering IVF for cows. It's a common practise for dairy cows to be made pregnant using artificial insemination, but IVF is more specialist. It allows for multiple embryos to be produced from one particularly good cow, meaning the genetics of a herd can be improved more quickly and its health and productivity improved. But it means hormonal treatments and some invasive procedures for the cow - so is it ethical? In a world first, methane from slurry on a farm in Somerset is being broken down and turned into hydrogen gas and graphene. Graphene is a material that was discovered in the UK 20 years ago, and is normally made from mining graphite rock. But a company called Levidian has developed a process which separates the carbon and hydrogen in methane gas, to make graphene and hydrogen. And ten police forces across the country will soon be trialling new forensic technology to help identify dogs involved in livestock attacks. We hear from farmers affected and find out why the police think this new kit will help. Presented by Charlotte Smith Produced for BBC Audio in Bristol by Heather Simons