When does inbreeding become an issue?

I'm think I read on another forum that you can breed mother and son, but not brother and sister? I don't know but hopefully someone will help you. Personally, I have one roo. He has bred his mother and sisters, and his own offspring and there does not seem to be any problems. I think later down the line (like really far down) you might see some problems, but you should be fine. Unless you are trying to breed for show, it really does not matter.

 

Jeff, you`ll be fine for several generations, at least 6 with the tightest breeding. If you start seeing defects, just get another rooster and keep going. Good luck, from one transplanted flatlander, to another........Pop

 

Like Lollipop said,
I don't think it will really be an issue.
I can only see problems arising down the line in the very late late generations.
Thats when you may need to bring in a different chicken for breeding.

 

The new blood has to be a rooster. No problem adding hens from time to time, but the rooster will "spread the love"...........Pop

 

Here's a simple linebreeding plan that a lot of folks use. You can add a new rooster at any point and start from the top again.

 

Inbreeding isn't as much of an issue in simpler creatures as it is in complex creatures. As the others have said, you'd need to inbreed down a lot of generations before you notice any defects. The reason it's so taboo in humans is that our brains are so complex that mental defects pop up really easily with inbreeding. Essentially, it's not as much of a tragedy if you end up with a dumb chicken.

However, keep in mind that if you keep inbreeding, you are eliminating nature's most powerful weapon against disease resistance. Re-combination of genetic material from differing sources keeps your line robust and disease resistant.

So to simplify... just put in a new rooster after your next hatch and you won't have to worry