Ok, so I know both dogs can hold it for 8+ hours. but...when left out of crate, it seems 30-40 minutes is all they wait before having an accident, especially Bo. If we are home, they tend to go out every 2 hours when they ring the bell. How can we train them to go longer than that when left alone? Mike is determined to wean them off the crate, and so far, both times have resulted in accidents in the house. any suggestions?