I aquired three sets of d'uccles earlier this year. A pair of milles, a trio of gold necks plus a gold neck booted bantam (roo is beautiful but has much black in his tail), and a quad of porcelains.
Oddly enough those porcelain girls--which should be a year or so old--won't lay to save their little lives. We did a round of worming two weeks ago on all birds. The next day, one of the porcelains laid an egg. I thought I'd solved the problem. Nope! She, nor her friend, have laid since.
Any other magical suggestions? I've never run into this problem. Someone suggested I mix some cayenne pepper in with their feed?
I have just hatched two groups of chicks from the others. I am excited as they were all in quarantine together for a while and were then separated by coloring. I am hatching milles, gold necks, and whites. There are two others that are only two weeks old, but look like they are feathering in bright yellow and black. I am eager to see if I can figure out the history of their genetics, but it looks like my gold necks may have some mysterious backgrounds.
Black D'uccle pullet. 
Muffs are filling out excellently.
