I understand from the little research I made, that they can regurgitate found to give to whom they "love". With the head  bobbing and all.  However, here's what happened a few times today:   -She starts making a weird noise with her nose, almost like she's breathing faster.  -She starts regurgitating food, but it just looks like some.. strange white stuff, almost looks like butter.  -She does it multiple time, even while alone on her cage and doesn't try to give it to anybody, instead just throws it away.  All this together has me a bit worried. She doesn't seem unhealthy otherwise. Though after she just did it, she's very calm.  Could there be a problem here?