Who did Billy get the dogs from in Where the Red Fern Grows?

In the book Where the Red Fern Grows the book never tells who Billy Coleman bought the pups from.  He finds an ad in a paper and brings it home to his grandpa.  There is a kennel in Kentucky that has coonhound pups for sale for $25.00 each.   He asks his grandfather to order them for him and dumps his money out in front of his grandfather.  He tells him that he had saved up for two years.

Billy's grandfather orders the puppies for Billy, but it still does not even state the name of the kennel.  Billy finds out that the price of each dog had dropped by $5.  He also learns he has to go to Tahlequah to the station to pick up the pups.  Billy had to sneak off to the station in Kentucky to pick up his pups.