depending on the dog, i had to work with mine for months before i could trust them with them- i leashed them near the pen- stayed with them at first when we let the chickens out, would take them for walks when the chickens free ranged- and only one dog at a time- watched their body language- each case will be different- one dog will round the ducks up whether they need it or not... watched her one day herd them around the house 5 times before i finally realized what she was doing- these dogs were dump dogs, i am thinking with the poodle, possibly get in there with her on a leash and work with her- the weimaraner breed is a birding breed, so she might need alot more work.... the big thing is to work with them, so they understand the chickens are part of the family