I think it would be a good idea to let Thumper keep this one. If you give Angel some eggs you can see if she is going to be a good mother or not. She will need to actually sit on eggs for a while to get used to it so to speak. Chances are she is confused as to why there was suddenly a chick.
Thanks. I just checked on them a bit ago and the chick is so much happier!!! All warm and toasty under her new mama.