Thanks!
I don't know what the park is going to do about feeding the waterfowl.  There are a couple of disabled ducks that can't feed themselves properly due to deformed bills.  
Most of the other ducks/geese are great foragers and I think they'll be fine.  There are still people feeding them now and then, but it's been cut way back.  Most of them are too fat, anyway, and need to lose weight.  
I am going to publish and article on the problem of feral geese in San Diego.  Most of them are not managed or cared for at all by anyone.  But, at one lake, there are people who do feed them healthy food and handle them, too.  So, they act a lot different than the geese at this lake.  I don't know what they're going to do with the waterfowl.  I think if anyone wants them, they can take them, but many community members may get angry if anyone tries.
Tom, the muscovy, forages/hunts very well even though he can't see well.  He was always picky about what he was fed, anyway, only eating birdseed.  Sometimes, he ate bread, but not much.  He's a little overweight, too.  I don't think he's going to live a lot longer.  I love when I hold out my hand, he nips at me thinking I have food.  Then, when I try to pet him, he would hiss and move a few feet, turn around, and wag his tail like crazy.  It's as if he's saying, "oh, sorry for biting and hissing at you, I mean you no harm and I'm really friendly, actually".  He doesn't bite hard and I know it's because he can't see and is used to being hand-fed.