By Emma Rowbottom A woman has been left in stitches after her cat received an addressed letter in the post reminding him about his upcoming vet appointment. Rather than writing to the owner, Dr Mike at the Animal Medical Centre, in New Zealand, decided to pen a letter directly to Loki, a cat who has an incoming check-up. The adorable letter has taken the internet by storm, and reads: “Dear Loki, It’s time for your vaccination, which is very important to prevent you from contracting infectious NZ diseases from your fellow cat mates or the environment.” It went on to say that Loki would also hav…