The clue is right there in front of him. Is that bird food? I think not, but the photos below clear things up.
I first came on this scene from the other side and saw Smudge, the cat lying down, with an intense look on her face. Another pace brought the Spotted Dove into view. I took photos, but they were into the sun and not great. So I walked around the building to get the sun behind me.
The bird was still busy pecking at the food, the cats staring intently, but doing nothing else. That inactivity wasn’t surprising. These cats are very friendly when they’re hungry and utterly indifferent once they’ve been fed. And after the cats have eaten birds move in for the leftovers. The birds remain wary, but have learned there’s not much to worry about at this time.
In the end, Smudge decided she had to do something about this brazen intrusion so she got up and wandered away to the front of the building where she plopped down in the shade, serenely out of sight of the feathered affront taking place on the lanai.