i yell at my husband when i catch him feeding oatmeal cookies to the birds... and they LOOOVE the cookies too. dally has a sweet beak. as a baby she got into my lucky charms cereal and stole a marshmallow. that was the end of it, now she tries to steal it every time i eat it--and she's going on 4 years old now! she has stolen a bite of my carrot-orange muffin once. i turn around and she's chomping away at it, looking quite proud of herself.
as for the people food goes, they get wholegrain bread, so yes bread is okay as a treat, but wholegrain is better (we use Dempster's Ancient Grain), they get a nibble of cheese (dally's big favourite!), Kaiser rolls if we're eating any, chicken, cherios, raison bran, any "healthy" grain cereal that we eat, the very rare treat of the grain part of lucky charms, and the very rare bite of a muffin or cookie if they sneak it.
but a regular human food we give is sugar free natural fruit juice. things like mango-coconut water or cranberry juice... dally loves them.
ironically, dally is our pickiest eater for the HEALTHY BIRD foods! she likes her seeds and pellets mostly with some veggies. the rest... nope she'll turn her beak up at it if it aint crunchy and dry lol