Gigachad poultry
Rest in peace Eda ~ 2018-2024
Thank you so much for clearing that up! I really wasn't sure what I would get.Sort of yes, sort of no.
--The first generation cross will not be a Cochin. It will be a mix. It would take quite a few generations of breeding, and careful selection, to have the right traits to really call the bird a Cochin. Starting with those particular parents, you might never get one that has the correct Cochin single comb and also lays colored eggs. There is a link between the blue egg gene and the pea comb gene. It could help if you use Cream Legbars, who would have the blue egg gene linked to not-pea comb (single.) Using Ameraucanas will have the blue egg gene linked to pea comb, which is not right for a Cochin. Easter Eggers can go either way, depending on what breeds are in their ancestry, but you can tell without actually knowing who their ancestors were: if it has a single comb and lays blue or green eggs, it has the right linkage for your project.
--The chicks may be Calico colored or they may not be, depending on which color genes the non-Cochin parent has. If the chicks are not calico, breeding some of them back to the Cochin will give you a good chance of getting calico babies in the next generation.
--You can probably get green eggs that way, but "olive" is used to refer to the darker shades of green. You will probably not get dark green ("olive") eggs.
Not that I know of.
Just like with the other idea, it would need multiple generations of breeding & selection to have birds that can reasonably be called "Cochins."
In the first generation cross, the daughters will probably lay eggs that have an in between shade of brown (darker than the Cochins, lighter than the Marans.) Later generations could have darker eggs or lighter eggs, depending on who they are bred to (backcross to Cochin would give lighter eggs, backcross to Marans would give darker eggs, breeding the mixes to each other will give some birds who lay light, some who lay medium, and some who lay dark.)
I think the calico color requires the mottling gene. That is recessive, so the crossed chicks will not be calico colored. Breeding them back to the calico cochin, or to each other, should be able to produce some calico colored chicks.
So say I was to mix cream legbars and calico bantams together, them I breed the chicks together for the next two generations. Then if I reintroduce the calico bantams Cochins and continue selecting only hens that lay green or blue eggs. After lots of selective breeding would that become a Cochin?