Yes, transitional leashes and slip leashes are essentially the same thing. They both refer to a type of leash that combines the functionality of a leash and collar in one design. With a slip leash or transitional leash, there is no need for a separate collar or harness. The leash loops around the dog's neck and tightens when tension is applied, providing control and preventing pulling. These leashes are commonly used for training purposes and can be effective in teaching dogs to walk politely on a leash.