yes here's a tip.... and i know this from having a parrot for twenty years.
In the parrot food there was always dried hot jalapeno' peppers.... and i often wondered
why they liked to chew on them.... tried it once and it was a 3 alarm fire in my mouth HOT!
it doesn't affect the birds palate (OR TONGUE) for some reason....
same thing applies to our native Birds: so-> give them a 3 alarm fire in there mouths
buy a CAYENNE pepper bottle of spice or several of them at an outlet store
and put some (dampened with a fine water spray) sunflower seed out for them
with cayenne pepper liberally coated and as they stuff their faces or eat them
they'll soon be running for water,,,