An F1 Doodle is half Retriever and half Poodle. These maintain a lot of the Retriever qualities, but usually still shed a good deal. An F1b Doodle is the product of an F1 Doodle (see above) bred back to a Poodle, for a higher chance at low/non-shedding puppies. Half of an F1b litter should be non-shedding like their Poodle-daddy, and half will still shed like their F1 mother.