Some people say that St. Bernards are lazy and dumb. In fact, I found a list that ranked the St. Bernard #117 on a list of breed intelligence. But Chewy continues to excel at his manners training, learning Leave It in a very short time.
We also taught him Drop It when he has something in his mouth, and to Wait before going out the door, all in less than an hour. There is no doubt that intelligence list is flawed, as every, single dog is an individual and the ability to learn is influenced by many factors that don't include what breed they are.
Jeff Dentler, CPDT-KA, IAABC-ADT, FFCP, CTDI