COI

[Oriole]

Most of my stock used to be less than 50% COI, and now they are all 100%+. I'm very upset.
Does anyone have any tips on how to keep COI low, without much outbreeding?

[Argent]

Not possible. COI is increased by inbreeding, so the only way keep it low is to not inbreed

[BlackOak2]

Most of my stock used to be less than 50% COI, and now they are all 100%+. I'm very upset.
Does anyone have any tips on how to keep COI low, without much outbreeding?

There are ways to do so, including how to limit and lower it. Find some useful informational links below:

Some information on the new formula on COI is here:
viewtopic.php?t=43148&hilit=COI&start=10 - second page, see larissar's reply, nearer the bottom.

Current Links on COI
viewtopic.php?t=43654 - In progress for no COI (or low COI) on creating new breeds.

The other links are likely ones you already have read and may use (still found in my quicklinks). What I can suggest is that you use grade horses to help control your COI, just like the earlier topics I've offered to the community. But since the new model uses 5 generations (rather than, was it 7? before), you should be able to, theoretically, use horses that are older than 5 generations to maintain, bring down, and control your COI. What this'll mean is that you'll want to (probably) keep a couple of stallions, or more, that are 5+ and that you haven't bred to (initially), saved in freeze. Rotate them on that 5+ generational cycle.

I haven't yet delved into how to control COI with the new formula, so if you want to be safe, five unrelated stallions should be the right bet. Maybe make that six. So that when you return to your very first stallion again, he'll be showing up on the pedigree outside of that fifth generation. That should control your COI under this new formula.

But again, I haven't yet worked with COI control with this new formula.

I am currently working with the Exmoor community project and I have been using some high COI horses for color introduction and the same concept still applies; breeding to outcrosses does cut the COI quite considerably. So using generational horses that are well back in the pedigree will (or should) considerably cut the COI as well. The questions are, which generation will do so and how many horses need to be saved to keep the cycle and COI intact (heading in the correct direction)?

I can't yet answer these two questions with certainty. I don't know if anybody yet has a solid answer (through practice on their theory), to offer direct evidence or a workable blueprint for you.

Hopefully, the links will offer you some additional insight to get you back on track.

[Oriole]

Thank you both!