That can cut both ways. An adult dog who's been conditioned to eliminating indoors can be a bear to housebreak. Take a puppy outside and they'll have to go in a short time. Especially if you get them running around. An adult dog who's determined to hold it 'til she gets back on the carpet can keep you outside for hours. BTDT.In any case, adults are easier to housetrain than pups simply because they have an adult sized bladder and adult control over it. Pups have about a 30 second warning, but adults have much, much more than that.