Just curious at the age of when a dog is no longer considered a puppy and will no longer require the "addition/higher" rates/fees
Dogs under one year of age are considered puppies by Rover.
Tonight I discovered what I consider to be a bug when calculating puppy rates. Our puppy turns one next week, so according to Rover he will only be a puppy for another week. However we booked his stay for three weeks from now (when he's a dog!) and he's still being calculated at the puppy rate.
Each sitter sets the price for puppy rates, so you may find one sitter that charges more, and others that don't.