 Sigfried becomes annoyed with Jenny Garston and David Rayner who are constantly bickering, usually about horses. Both have mares in foal and are convinced they know more about horses than the other. It s all the more complicated because his nephew is married to her daughter and they will soon have a child. Sigfried and James have a quiet pint of ale (during off hours) with Reg, the owner of the Black Horse, just when PC Gould decides to see exactly what is happening. The vets have think on their feet to make things right.