Barking To Be Let In

Wyatt, as far I can remember, has also barked to be let in the house. He is quite quick to bark when he is ready to come in, especially in the winter, when he must set records for quickest to do his business. Patriot, on the other hand used to never barked to be let in. Finally, at the age of 7, he has learned to bark to be let in the house. I am not sure if he finally learned it from Wyatt or if comes from the time I forgot him for about an hour in the cold weather and he started to try different things. He now will bark after a while - though not immediately like Wyatt - to be let in. I guess a old dog can learn some new tricks!