Broken up fat balls OK for swans & ducks?

[ReverendCounter]

Are our amphibious aviators OK with these bird seed/fat ball combo products? I'll make sure they're broken down into manageable chunks but is the high fat content somehow an issue for waterfowl?

[Doofus]

'Our' ducks won't touch them, oddly. They're very popular with all the wild birds, but the ducks ignore the broken bits on the gound.

I tried feeding them some on the pond too, and ended up having to pick the bits out again with a net.

Not a very relevant answer, I know...

[PositronicRay]

Popular with mice, rats and squirrels too. I've located them away from the house.

[ReverendCounter]

Argh, pecky buggers.