When is a puppy fully house-trained?

The AKC's puppy timeline, with input from its chief veterinarian Dr. Jerry Klein, says a 6-month-old puppy that started training early can usually be depended on to go outside most of the time. Most of the time is the honest phrase. The AKC's how-to guide adds that some puppies build reliable habits within days while others need several months, especially when their routine was inconsistent before they came home.

For the finish line, count weeks rather than months. VCA's house-training guide says a puppy that has gone 8 to 12 weeks without mistakes is probably ready for more freedom, and that many puppies still need a trip out overnight until about 5 months old. Put together, a puppy brought home at 8 weeks is often reliable in its own house somewhere after 6 months, with freedom then added a room at a time. The table sets out the stages.

Adolescence usually starts around 6 months, Cornell's veterinary college says, and can run to 18 months or 2 years. Three things change at once. Marking typically begins in adolescence, around 6 to 9 months according to the AKC, and it looks different from emptying the bladder: small amounts in several places over a few seconds, rather than one pee of around 20 seconds. The outdoors gets more interesting, so a teenager may come back in without finishing. And owners, after six good months, hand over the whole house.

That last one is easy to avoid. The AKC's guide says increasing freedom gradually tends to work better than unrestricted access too early. VCA's behaviorists add that a dog which has not finished outside should come back in under supervision until it does, and that a healthy dog with a relapse is best retrained as though it were a young puppy. A sudden change is different: both the AKC and VCA say new accidents in a puppy that was doing well can have a medical cause, so call your vet first.

Tiny Tails Puppy School, for pups 8 to 16 weeks, focuses on life skills, confidence and heading off common puppy challenges, and the puppy keeps sleeping at home, where house training is actually learned. Our AKC S.T.A.R. Puppy course runs 6 weeks and 12 sessions for puppies aged 8 weeks to 6 months. Both are led by Gabriella Pope, our Director of Training & Canine Behaviorist, with sessions from $94 after a short assessment.

If nobody is home at midday, a 20-minute walk from home is $25, or $225 for a 10-pack; ask us whether we cover your address. Half days of daycare at $33 keep a young dog on a timetable once it has passed the free evaluation, held on weekdays between 6:30 and 9:30 AM, and the Pup Van runs in Rockport, Gloucester, Essex and Manchester-by-the-Sea for $10 each way. Our answer on daycare and potty training explains how the two fit together.