I'm wanting to keep the ped good and tight, but would that make it too tight? I'm planning on outcrossing within a year or two.
To answer your question I would go with dad over brother and it is not to tight once.
Why stay so tight to plan an outcross so soon? I understand the dad is old and that would be a good reason to stay with him. If the brother is as good, have you considered out cross now and back to brother in a year or two? Ive never understood breeding so tight to plan an out cross. seen better long term results with loser line breeding within the same family. JMO
No reason to plan an outcross so early,, I'm doing my homework to line/inbreed and I figured I'd start now...
I've produced 2 AB litters in 10 yrs, I'm not as big on breeding as I wished I could be, this is my 1st step to keep a good thing going....