Dood, those are really impressive numbers. I'm also feeding a natural diet and have been satisfied with our results but they are nowhere near what you are getting. I've been hesitant to try bringing in new rabbits because it isn't easy to find ones that have been on a natural diet and I wonder if we'd just bring in more problems and not necessarily improve growth.
Also wondered if your kits are sexually mature early since they approach adult weight so early. Our adults are 7 to 9 pounds, but we don't reach 5 pounds until 12 or 13 weeks.
Sorry if this is a thread hijack--I'm not really helping much on the original question.
I'm in the same boat, ivevtriedba new buck a couple times and both set me back so for the most part over the last 5 years I've "kept the best and eaten the rest" and I frequently replace my does with faster growing and/or meatier youngsters
Yes, my rabbits do mature quicker, if a doe hasn't had her first litter by 6 months she is short listed for replacement. I also prefer them on them smaller side as adults - eat less, smaller poops, easier to manhandle