I was one that i agreed that it was too big.. But what iam trying too get across too you is IMO, you'd be better of with seprete kenneling for each dog,
Theres been a lot of dogs killed in kennel fights, theres bitches in seasons, feeding, When a dogs sore or injuryed they want left alone ect,
Thats my point in your 28'x5' design not the size i think you could use it a bit better , Its your kennel fellah you have it what ever size you want but iam speaking from expercince here with paired + in kennels