Great Turtorial! Im currently teaching Teddy this trick
He does take the blankie and will hold it, but as soon as i say roll over, he drops it and rolls.Does he still have an interest in the blankie?
1. Any interest he has towards it, even if it's just a sniff, click & treat. Then ask for more from him.
2. Hand the blankie to him and if he takes it from you click that.
3. Then the next time do the same thing.
4. You might need to work on perfecting each step separately.
5. Once he takes the blankie in his mouth consistently, add duration of holding the blankie.
6. Then once he's holding the blankie long enough, add the "roll over" cue to it.
Hope this helps!