Pet Care Needed

My dog is a 4-month-old golden doodle. He is housebroken, but doesn't always know how to tell us when he needs to go outside. He will stand by the door, but sometimes only briefly, and he doesn't always bark or ring the bells, so the caregiver has to be somewhat vigilant. He has normal puppy behaviors including nipping, but is usually easy to control with treats. ir kibble.