I mimic their sounds and am not ashamed of it :-) Whether cats, dogs, or birds, or the pair of wild crows i feed outside, it doesn’t matter. I even mimic the sound of danger that our wild doves make when they see a sparrow hawk. So, if i see one while hand feeding a dove, i point and make the sound and look up very obviously so they know there is one circling around our garden (but often they notice before i do).