Speaking of bird seed, they are nutritious and most birds love them. You can combine them with pellets or offer them as snacks, so they can munch on seeds all day long. Some brands provide snacking options, such as seeds on sticks, so birds can forage for them, put some efforts, and engage their minds. This is always preferable, because birds are intelligent and curious, and they should be entertained while they try to eat, just like they do in nature. It is in their instincts, and even if they are indoors, some behaviors need to be encouraged and compensated.