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People keep it going (lots of us have 2nd, 3rd, even 6th gen olive eggers) by crossing back to the Marans or Ameraucana. From there, keep bouncing around. Some do indeed breed Olive Egger x Olive Egger, but when you do that on the first generation, you'll get a good chance of plain 'ol brown egg layers too.
My advice is always to go like this -
Dark Brown x Blue/Green - Olive Egg
Olive Egg x Dark Brown - dark Olive Egg
The next step is your choice. . .
dark Olive Egg x Dark Brown - takes you right on to just dark brown or possibly brown.
dark Olive Egg x Olive Egg - not sure of but sounds like a really good mix
dark Olive Egg x blue/green - should take you right back to the more original type olive eggers
With me, a big importance is to get a good look on the Olive Egger too. I like my mutts to have as much a goal as a purebred.
For one example, I'm working on Buff Ameraucana x Black Copper Marans. The first gen will hopefully give me a 25% chance of dun colored brown-red looking birds, whom I will breed back to the Black Copper again, to get a 50% chance of dun-copper birds. With very focused breeding and successful dun genes being available, this will make for a bearded/muffed, feather shanked, chocolate colored dark olive egg layer with buff colored hackles/saddle.
A guided photo from the Chicken Calculator to show color:
People keep it going (lots of us have 2nd, 3rd, even 6th gen olive eggers) by crossing back to the Marans or Ameraucana. From there, keep bouncing around. Some do indeed breed Olive Egger x Olive Egger, but when you do that on the first generation, you'll get a good chance of plain 'ol brown egg layers too.
My advice is always to go like this -
Dark Brown x Blue/Green - Olive Egg
Olive Egg x Dark Brown - dark Olive Egg
The next step is your choice. . .
dark Olive Egg x Dark Brown - takes you right on to just dark brown or possibly brown.
dark Olive Egg x Olive Egg - not sure of but sounds like a really good mix
dark Olive Egg x blue/green - should take you right back to the more original type olive eggers
With me, a big importance is to get a good look on the Olive Egger too. I like my mutts to have as much a goal as a purebred.
For one example, I'm working on Buff Ameraucana x Black Copper Marans. The first gen will hopefully give me a 25% chance of dun colored brown-red looking birds, whom I will breed back to the Black Copper again, to get a 50% chance of dun-copper birds. With very focused breeding and successful dun genes being available, this will make for a bearded/muffed, feather shanked, chocolate colored dark olive egg layer with buff colored hackles/saddle.

A guided photo from the Chicken Calculator to show color: