Puff has gradually been getting to the sauntering stage.
I'm thinking of cooking up some of her favorite treats (dime sized slices of hot dog, sprinkled with a little garlic powder and then briefly nuked) and using some particular signal (e.g., whistle or something) to signify the "no fooling, right now, ASAP!" so we have a relaxed come and an immediate COME.
do you use a lead? one thing you can try is get a long lead (20' or longer) and anytime Morgan stops or even thinks about stopping a nice little tug with a "no come" with it. he will learn soon enough when you say come you don't mean come "whenever you feel like it"
Have you tried:
Call, wait for dogs attention, turn and quickly (decisively, but not running) start walking away?
I know it sounds simple, but it works more often than not.
I've done this a lot with dogs. walking down a trail, call, walk off into the woods. Sometimes I may need to wait (out of sight), but the dog always comes running looking like he lost something.
Only exception is at the end, the dog may run ahead and wait at the truck. I always leave the tailgate down and allow this as accepted practice. Never let a dog think it's NOT a good idea to go for a ride. It's a "safe restart" thing.