What is your rationale for breeding this bitch? Is she exceptional (determined by a disinterested 3rd party expert in Labs) and been proven in the field or in the show ring or in obedience/agility? Has she been tested and cleared for all potential genetic issues Labs can have and pass on?
Breeding can be very expensive and potentially cause a medical emergency for your girl - can you afford it if she winds up in the emergency vets and the bill climbs to 5 grand or more because you want one puppy from her?
There needs to be a really good reason to breed - not just that you want to. To deliberately breed a dog who does not conform to the breed standard (as yours does not due to her very small stature) is not responsible.
As for breeding her to a Poodle - aren't there already plenty of mutts in shelters? You could get a great companion there without adding to the problem.
Sharon, Blaise and Diesel.