"Housetrain" means to teach a pet, usually a dog, to go to the bathroom in the appropriate place, like outside or in a designated area inside the house, instead of letting them do it anywhere they want. Full definition
I also do phone consultations for housetraining problems in dogs. (poochped.com)
However, a loss of housetraining with frequent accidents may indicate a more serious problem, so see your veterinarian if your dog has any problems with urinary function. (lovinmypup.com)
It is also a good idea to purchase pet cleaning supplies in advance of the arrival of your new dog, as accidents during the transition period are likely, even with housetrained dogs. (fohari.org)