Hello, again!
You know what really puzzles and amuses me is what, exactly, "unrelated" and "inbreeding" mean in the rabbit world.
I chuckle every time I use the term "unrelated" with rabbits. Unrelated is defined by professionals in a few different ways. The parents breeding with offspring or siblings breeding together is "inbreeding"....all seem to be agreed on that. BUT--not all inbreeding is evil.
So, about "inbreeding"...In my research over the past few years (which, of course, makes me an "expert"
), I discovered from several sources that professional breeders will not hesitate to breed even siblings with special qualities in order to bring out those qualities...and then will "out cross" the desirable offspring to maintain breed stamina. Of course, with the siblings, that is "inbreeding"...and would have to be done responsibly--quick to cull any that are not healthy--careful to outbreed responsibly and knowledgeably. I guess that is why it is left to the professionals--otherwise the rabbits might suffer from various health issues...and unhealthy animals could even be sold as breeders....eventually becoming sterile ("breed depression").
Here is a very interesting article on the subject from the University of Missouri:
Inbreeding: Its Meaning, Uses and Effects on Farm Animals
And, by a breeder, a very good article:
Crossbreeding, Outcrossing, Linebreeding, and Inbreeding
As far as your own situation: You might plan to get an unrelated buck every few years to keep your herd strong. A simplistic solution, I am sure, but pretty clear. My guess is that if you read those articles you will gain confidence.
Anyway, my first time encountering the writings of a professional breeder on the subject of "inbreeding" rabbits, was...enlightening.
I truly enjoy learning more about the subject and not being governed by fear--as I had been.🌤 So, I will probably keep following this interesting conversation!
God bless you!