Clinical animal behaviourist Rosie Bescoby has shared five straightforward training methods to help older dogs learn new skills.

Sarah Silverman didn't have to think hard when David Letterman asked if she was interested in hosting the new show "Stupid Pet Tricks." “I was like, yes. Oh, my God. Yes. A million times,” she jokes.

Rosie Bescoby, who is a clinical animal behaviourist, has opened up over the five tricks you could teach your aging pooch ...