My Blue Crowned conure, Roscoe, seems to purr when I pet him in the evenings. He pretty much demands to be up under my chin and then he makes a purring sound. I have noticed that he does this sometimes during the day when I am scritching him, but mostly he does this in the evenings during his one-on-one mommy time. Is this common? He sounds just like our cat. I have noticed that if the purring goes on for too long he gets a little over excited and I have to redirect him with doing something else--but he goes right back to wanting to be cuddled. Is this normal?