I am looking for some advice on teaching my 2.5 yr old YL to jump off a dock to retrieve a mark. Currently he "takes the long route" back to shore and then proceeds to swim and get the mark. Any thoughts on how I should approach this. What I have tried is tossing the mark a couple feet from the dog, he will try and reach for it, wimpers/wines, he wants it but then he takes the long route. Any tips are most appreciative. Thanks.