The Ibis dont care about the dogs... when they get chased they fly up, do a lazy loop, and then land on the other side of the yard.
Repeat 2 or 3 times and the dogs are buggered and the Ibis just go back to nomming away on lawn snacks.
Although right now the dogs are locked in the granny flat yard because running around that marshland is making for some grubby puppies (who then come in and sit on the lounge / our laps....). Its the Ibis yard now.