Actor-singer-sportsman Gene Autry thought his horse, Champion, merited his own show. First on radio, then on television.
In 1955, The Adventures of Champion made the transition from radio to TV, but lasted just 1 season, airing first in primetime on CBS. The series later moved to Saturday mornings, but was long gone from the airwaves by the time I was old enough to watch TV, so there won't be a rating.
The transition made sense, since a radio show about a horse didn't seem to have much behind it, either.
Hulu brings the opener, "Saddle Tramp".