Anybody here own the big white horse?

The Lone Ranger and Tonto have been riding across the dusty prairie all day. They come to a small town and dismount and go into the saloon for a drink. Later a man comes in and says
“Anybody here own the big white horse?”
“Yup” says the Lone Ranger
“It looks mighty thirsty” says the man
“I go and give Silver a drink of water, Kemo Sabbay” says Tonto
Later another man comes in and says “Anybody here own the big white horse?”
“Yup” says the Lone Ranger
“It looks mighty hungry” says the man
“I go. Give Silver a feed of hay, Kemo Sabbay” says Tonto
Later yet another comes in and says “Anybody here own the big white horse?”
“Yup” says the Lone Ranger
“It looks mighty sick” says the man
“I go run round Silver and fan him with warbonnet. Keep him cool” says Tonto
Much, much later a man comes in and says “Anybody here own the big white horse?”
“Yup” says the Lone Ranger

The man says “You’ve left your injun running”