That's funny. My last year old bantam hen (in my avi) has taken that up, too. Since she became the lone one we pen her near Neil for company and every morning we can hear him crow with a follow-up from her. She does pretty good at it.
x2 I have a few girls like that and would like to know, too.
Backyardfarmmom- funny pic
hello sarah jane
vj and fuzzy- what age d'uccle pics are you looking for? I have a pair that are 4 weeks old if you want to see them.
eta- vj, I looked at your link and I agree with the few others that you have 2 boys there. I have one that was somewhat similar in coloring to your black/white if you want to see a pic at how he turned out.