All Creatures Great and Small (1975)
All Creatures Great and Small is a British film from 1975 (copyrighted in 1974), directed by Claude Whatham and starring Simon Ward and Anthony Hopkins as the Yorkshire vets James Herriot and Siegfried Farnon. It is based on James Herriot's first two novels, If Only They Could Talk (1970) and It Shouldn't Happen to a Vet (1972), and was given the same title as the 1972 US compilation volume of these two novels. A sequel, somewhat confusingly titled It Shouldn't Happen to a Vet although it actually covers the two following novels, Let Sleeping Vets Lie & Vet in Harness, was released in 1976.
More at Wikipedia.