I don't know about soy butter Brit, but I do know that any soy meal that is going to be fed to birds must be specially heat treated or it can be toxic to birds. I am a bit rusty on the subject now as I was toying with the idea of using soy meal in a hand raising mix I was making about 16 years ago. I found out when I was researching suppliers and one very helpful miller told me specific requirements. I decided against using it. It has something to do with the hormones present in soy beans.