Keeping Cassie the Collie Calm

So I am watching my folk’s dog Cassie who has hurt the soft tissue in her elbow. She’s part Collie, part Duracell and goes 70 mph all day, every day. And I am in charge of keeping her calm for 10 days to heal… So what’s a bored Cassie dog to do? Training! One way to train an animal is by…