What happens when a tamed bird eats wild bird food?

Nothing really, except he might not be getting the right nutrition. Some bird seeds are heavy on things like thistle or sunflower to attract a certain kind of bird. Too much of those seeds would be bad for most tame birds. There are three categories of food for pet birds: seed, pellets, and people food. My birds won't eat pellets so they get seed and people food. If you eat well, easy on the meat and a good amount of fruits and veggies, your bird can eat what you eat with a little seed on the side.