The so-called “Puppy Bus” is already a viral sensation, and we bought its founders to interrupt down all of the methods and treats behind their immediately booming canine strolling/coaching service.

Mo and Lee Thompson joined “TMZ Live” to speak all about their biz, “Mo Mountain Mutts” … after their canine bus unexpectedly turned a social media phenomenon.

The husband/spouse duo advised us the bus is only one a part of a day full of canine coaching and canine strolling round Skagway, Alaska — and after these extremely calm bus rides, the pups get out for an journey, filled with train and socializing.

They say the outings are deliberate to be bodily and mentally partaking for his or her 4-legged purchasers … like difficult hikes or a seaside run.

The Thompsons admit their well-liked bus movies are the product of fastidiously selecting which pups have sufficient obedience coaching to go to their assigned seats with out inflicting a ruckus. They added that the canines’ personalities, ages and manners are additionally components.

As for the way it began … Mo says at first she was simply strolling buddies’ canines throughout work breaks, after which she began doing biking and mountain climbing journeys with ’em.