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Ryan said:
Is it ok to breed a pair of the same bloodline? I here its fine for a couple but into the f5's and above it gets bad.
Hello.

The other posters are correct in their responses on this matter. Even past 12 generations it is still possible to breed siblings without "ill effects". I say "ill" because many things can remain latent. Some will look fine, but there could be a decrease in immune system function or other unseen problems. I personally choose not to cross siblings but will occasionally cross "cousins". Cousins average roughly 25% (but can be anywhere from 0-25%) of the same genes so I consider them somewhat unrelated.

Inbreeding basically causes a buildup of recessive traits over generations and the general thought is that recessive genes are often deleterious, which is not always true.

My advice to you is that you could cross the siblings and then trade the offspring for other individuals of the same species- then setup nonrelated pairs. Or an even better idea is to just trade one of the siblings and completely avoid this whole ordeal.
 
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