The Western Kid (who has a singularly unimaginative moniker) is the original alias of Tex Dawson. Tex Dawson is a clean-cut, Hollywood-style cowboy hero who rides the range with his horse Whilrwind "The Wonder-Stallion" and his dog, Lightning "The Miracle Dog". Together, the three companions right wrongs and fight injustice in the Old West.
In the 1970's, Marvel reprinted the feature under a new name, Gun-Slinger.
I'm sure y'all will enjoy this beautiful five-pager from 1956's Western Kid #13, with artwork by a young Johnny Romita.