A great many of the earliest Edison Kinetoscope movies featured popular performers who presented samples of their vaudeville acts or other similar specialties. There were also a fair number of early Edison features that showed boxing. This short movie combines the two genres, and it also demonstrates rather efficient composition in its use of the camera.
Professor Henry Welton apparently had an entire vaudeville act that featured cats trained to perform all kinds of tricks, so that the "Boxing Cats" routine was really only one of many such routines in the full show. The high popularity of boxing at the time probably made this a fairly obvious choice for the Edison crew to film.
The footage shows a tiny boxing ring, with the cats batting away at each other with their paws. The camera field catches the entire ring plus Welton behind it, looking on, so that even in a limited field it includes the entire scene. The miniature boxing gloves on their forepaws makes it look much like human boxing of a kind. It seems to have been largely harmless for the cats involved, since the gloves would probably have prevented them from inflicting any injuries on each other.
The footage itself is mildly entertaining, and the movie is also worthy of note as an example of the content and technique in the early Kinetoscope films.