Hi why do some people give newly hatched chicks crushed cuttle bone and plain yogurt I have never tried this

Hi guys, I have a Lutino Hen and someone told me she is a Lutino pearl. Anyone can tell me If this person is right? And this hen made pair with a White face cinnamon cock, If they breed, which mutations will happen in the baby chickens? Thank you! And sorry If I Said something wrong, English...

My handraised female and semi tame male cockatiel are 2 and 3 years old and ready to mate. However today my female performed a mating call, not to my male, but when she was with me?! Does she not like the male, or does she and I've just taken her out at a bad time? The male, is constantly...