Definitely not a pure Cochin. Cochins do not have a crest (the mohawk) or muffs (the cheek feathers)
Cochins should have single combs. I think one of your other chicks has a pea comb (the one sitting on someone's shoulder, with no crest or muffs).
I suspect that there have been several crosses...
My understanding is that Mystic Onyx were originally developed from the cross you mentioned, but were then bred for some number of generations with selection for the correct traits. This makes it harder to predict what offspring you will get, but it probably increased the chance that you will...
For all the hens:
Chicks sired by the Cream Legbar rooster will probably have a small crest, and will have a blue egg gene (so daughters will lay blue or green eggs).
Regarding color of the chicks:
Bielefelders are pretty much the same color as Cream Legbars, so chicks will be that color too...
For many colors of chickens, you can just breed a male and a female of the same color and all the chicks will be that color. You don't really need to learn about genetics to do that. If you start getting off-color chicks, then you go check your breeding stock and maybe learn about the genetics...
I can't really predict what color chicks will come from the white hen with any of those roosters. This is because there are several different genes and combinations of genes that can cause a chicken to be white, and I don't know which ones she might have. She might produce white chicks, or she...
I wonder, is there any chance the deaths were due to starvation? That could have happened if the feed was too big for the chicks to eat, especially if the smallest chicks fared the worst.
I'll definitely be curious to hear what the vet thinks.
Given all that, I think the temperature is probably fine. The behavior of the chicks is usually the best "thermometer," and it sounds like yours finding comfortable temperatures, with access to some areas warmer and some cooler than what they are choosing. That's good.
As they get older, they...
What is the temperature at the other end of the brooder? (The coolest place the chicks can get to.)
If they have plenty of cool space, I would leave the lamp alone.
Raising it does make the hottest area cooler, but it also makes the heat spread over a larger area. So that makes the "cool" part...
Sounds right to me!
I think that's right.
Has she produced very many chicks? And if so, were they all blue? If yes, then I think you're right that she is splash and has no Dominant White.
But if she also produces chicks of other colors, then there are other things that could be going on...
Probably female, based on the color of the chest feathers (if that color is all over the chicken, it doesn't mean anything. If that color is only on the breast, it almost always means female.)
Probably female, based on how small and pale the comb & wattles are.
Maybe female, based on the lack...
Silver turns gold/red shades to white.
Dominant White turns black to white.
If you start with a gold and black chicken (example: Gold Laced Sebright), you can add Dominant White to make that black lacing go white. Now you have a Buff Laced Sebright (white lacing on gold). Or you can start with...
Partridge breeds true in other breeds, so I think it should be possible in Silkies too. Examples: Partridge Rock, Partridge Wyandotte.
Obviously they will only breed true if they are not carrying recessive genes for other coloring (example: if a recessive white Silkie produces some chicks that...
The Dominant White wins, so all the black areas that would turn blue or lavender will get turned to white as well.
I think the actual explanation is that blue or lavender or chocolate affect the way the chicken's body produces black pigment, so it comes out lighter (different shades because the...
Dominant White turns black into white but pretty much leaves red/gold shades alone (example: Red Sexlinks that have a white tail-- it would be a black tail if they did not have this gene). It is dominant, so you get the effect if a chicken has even one copy of the gene. It tends to be a bit...
Yes, I think those kinds of hens would work fine for testing the Sebright cockerel. You should be able to tell which eggs are theirs instead of coming from the Sebrights, so just hatching them separately (or separated inside the incubator) should be enough to let you know which chicks are which...
The single comb one is easy: no gene for rose comb.
For the ones that show rose combs, if any of their chicks show single combs, you know you have at least one female and one male that carry the gene for single combs.
If you want to be sure about the genes, yes you need to test-mate them.
Do...
Wow, he is definitely showing a big comb for his age! Yes, a male for sure!
I agree about him too.
Your predictions make sense to me, although I wouldn't be too sure about any of the pullets at this age. A slow-developing male can hide for quite a while.
Good point about the yellow one and...