The animals are a great help.
Starsky the dog helps Roz scout out murder locations and occasionally finds a body (not human so far.)
Oto the horse stops her from working too hard by requiring constant food and attention. Picking up horse poo also provides quality thinking time.
Sadly the last of the cats, Minnie Minx, Toffee, and Twix, recently died, but they all lived to a great age and put in plenty of keyboard time.
The much-loved character of Hamlet is based on a mixture of all the cats Roz has known, but his appearance was inspired by Roz's friend's beautiful black and white cat, Paws.