I recently purchased a new Florida white buck not realizing the considerable size differences between him (5-7lbs) and my New Zealand X California does. Does anyone have any experience with this and know if I will be able to successfully breed them?
No problem there, I'm pretty sure they will breed just fine. I had a young ca. 3lbs wild buck knock up my 11lbs doe.
Is the buck grown out yet? If yes, growth rate and adult size of kits may randomly vary, kind of lottery.
What about a mini lop buck and a Flemish Giant/New Zealand doe? Is it possible that they could mate? We bought her (Jessica) for the purpose of breeding meat rabbits but we are hoping to mate her with the mini lop buck (Morty) and then selecting the best and largest buck from her kits to use as her permanent mate.
Any rabbit may breed with every other rabbit. The only worry about size difference is when the buck is much larger then the doe, well, actually I haven't read about actual problems, but many fear that the kits might be too big to be born. Can't tell if that's really a problem, but I'm not going to test that.
For a rabbit, any other rabbit is just a rabbit, they don't discriminate for size, colour, breed or whatever.
G1rlVeteran, I don't see any problem with your plan, although it might not result in the most effective meat breed (So what, mine need 16-20 weeks)