As you would expect in trendy California, his name is Pucci. And there's the rub. Pucci is several months old and set in his ways. Retraining is needed now, and that can be difficult. Like teaching an old dog new tricks, to coin a phrase.
Old dogs can learn new tricks, but it takes persistent effort and constant vigilance.
You have to be right there watching, ready to interrupt and perhaps startle him by rattling a can of marbles or something the instant he starts to mess in the house. Punishment, at least not severe punishment, is seldom required, and is worthless more than a few seconds after the crime is committed. When you abort the errant bathroom behavior, you must immediately take the dog outside, extol the virtues of the cold wet prickly grass, and should he comply, praise him as though he had just produced a wonderful work of art. Not everyone has the time or inclination to spend most of their waking hours on a puppy delinquency stakeout. And very few couples would be willing to sleep in shifts so the puppy would be guarded through the night.