When I was a kid, we had two dogs: a Pyrenean Shepherd, and a Labrador Retriever. The Retriever was a goofy idiot, but the Shepherd was smart. One day, the Retriever gets loose (we had to tie him up in the yard because he kept chasing things and running away), and the Shepherd runs after him. We never even realized what had happened until we saw the Shepherd coming back with the Retriever, holding the would-be runaway's leash in his mouth, and leading him back to the house. Must have been a weird sight for the neighbors.