I remember this show being advertised on the Arts and Entertainment channel in the early 80s as being from the producer of All Creatures Great and Small, and though it was a bit more contemporary, it certainly had similarities with that classic series. Both shows had a main protagonist who was a young, practicing vet who learns that the job entails more than he learned in school. In this series , it starts out that this young vet takes the job as a zoo vet out of necessity, with every intention of eventually becoming a regular dog and cat vet, but soon becomes fascinated by all the exotic animals, and eventually becomes a sought-out expert on the subject.....the other thing I remember is that the vet was sort of a lovelorn sad sack, when not treating the animals.....only about ten episodes were shown on A&E.....so I never saw the change in decades the synopsis refers to....