I would try feeding them in portions, if you leave too much food in the bowls they might flick out the seeds they don’t like as much and make a mess.
Might take some testing to figure out how much they eat in one day. Just keep cutting the amount you give each day until there’s barely any left the next day
Might take some testing to figure out how much they eat in one day. Just keep cutting the amount you give each day until there’s barely any left the next day