Wow those are interesting looking, Not sure what your plans were with them but id definitely keepthem to see how they look at adulthood

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Do you have Belgian watermaels also? They have poofs on their heads.A few weeks ago I had my mystery hatch. All parents are D'uccles. There is NO chance another boy can get in the coop/pen area. The ONLY change was the parents were treated with Doxycycline shortly before egg collection.
Here they are about 3 weeks out.
Both "yellow" ones...different shades, no spots. You can see the black mohawks in the background....
A better view of the mohawks. NO idea where the head tufts came from.
They were all black up until about a week ago...then 2 of the black ones started getting brown stripes on their necks. You can barely see them, but they are there.
Here is a closer view of the stripes.
Just thought I would share the interesting hatch I had. I have 6 eggs set to hatch in the next 24-48 hours....we will see what we get this time!
They are very interesting looking! But, they are definitely not pure d'uccle, those black chicks are much bigger and obviously have the crests. I don't think a medication wouldn't have that kind of effect, at least nothing THAT drastic.
Does she lay the same colored eggs as your D'uccles? And do you think she has Silkie in her?Of the chickens that were laying, all were D'Uccle. I have had them as breeders before with great results...nothing like this. There was one other pullet (3 months old) that was a mix of something. But she was not laying and all eggs were collected on the same day, so....even if any were hers...they all couldn't be. It just baffles me.