I'd suggest adding sources of fat or protein to their snacks: https://www.thespruce.com/good-bread-for-birds-385833 https://www.thespruce.com/good-bread-for-bir

I'd suggest adding sources of fat or protein to their snacks: https://www.thespruce.com/good-bread-for-birds-385833 https://www.thespruce.com/good-bread-for-birds-385833